Investment, Animal Spirits and Algae

Arjun and I did a webinar recently on our book Against Money, organized by Merijn Knibbe. We’re very grateful to him for putting it together, and should have video to share soon.

Even in a friendly setting like this, it can be a challenge to explain what the real-world stakes are in debates over money. But as it happens, there was a Matt Levine column the same day as the webinar, that offers a perfect application of one of the central themes of the book.

To be honest, this is not really surprising. You could even think of our project as backfilling the economic theory behind Levine’s columns, which the textbooks certainly don’t help with. “How Keynes explains last week’s Money Stuff” could be an elevator pitch for the book.

The lead item in this Money Stuff was about a hypothetical algae farming startup, and the financing thereof:

You start a startup with a far-fetched idea like genetically engineering algae to produce clean renewable fuel. You go out to investors to raise money. You say “we are going to genetically engineer algae to produce clean renewable fuel, if we succeed we will make a bajillion dollars, you want in?” The investors think that sounds cool, because it does. But they are responsible investors, they do their due diligence, they ask questions like “is that a thing” and “can you actually produce fuel algae” and “will it be cost-effective?” You do your best to answer their questions.

Do you exaggerate? Oh sure. That is the job of a startup founder. I once wrote, approximately:

What you want, when you invest in a startup, is a founder who combines (1) an insanely ambitious vision with (2) a clear-eyed plan to make it come true and (3) the ability to make people believe in the vision now. “We’ll tinker with [algae] for a while and maybe in a decade or so a fuel-[producing strain of algae] will come out of it”: True, yes, but a bad pitch. The pitch is, like, you put your arm around the shoulder of an investor, you gesture sweepingly into the distance, you close your eyes, she closes her eyes, and you say in mellifluous tones: “Can’t you see the [algae producing clean fuel oil] right now? Aren’t they beautiful? So clean and efficient, look at how nicely they [float in this pond], look at all those [genes], all built in-house, aren’t they amazing? Here, hold out your hand, you can touch the [algae] right now. Let’s go for a [swim].”

Of course, you are a startup founder; you are in essence a salesperson. Back at the lab, the algae scientists and chemical engineers and accountants are looking at your pitchbook in disbelief. “Wait, you’re telling investors that we can produce the fuel oil now? You’re telling them that we’ll have large profits in two years? Did you not read our latest status report?” The scientists and accountants are boring and conservative; it is their job to try to make the dream work in dreary reality. It is your job to sell the dream now.

(The brackets are there because he is repurposing text from an earlier column on AI.)

This is a story about finance, not venture capital specifically. The details would be different if the algae company were getting a loan from a bank, but the fundamental situation would be the same.

I want to make a few points about this.

First, what’s being described here is not a market outcome. Nobody has yet purchased any fuel made from genetically modified algae. To the extent there are market signals here, they point in the wrong direction — at current prices, the cost of producing this fuel would be greater than what it would sell for. Nor has this business shown profits in the past — it’s a startup. Right now, the market is saying this is a value-subtracting activity. Funding it anyway is the opposite of what market signals are saying to do.

Funding the algae project is an explicit decision by someone in authority. It is a decision based on promises. It is based, precisely as Levine says, on dreams.1

Joseph Schumpeter compared the function of banks under modern capitalism to Gosplan, the central planning agency of the old Soviet Union. Banks, through a conscious, deliberate decision, dedicate some fraction of society’s resources to some project that they have decided is worthwhile. “The issue to the entrepreneurs of new means of payments created ad hoc” by the banks, he writes, is “what corresponds in capitalist society to the order issued by the central bureau in the socialist state.”

What’s more, as Arjun and I write in Against Money, banks

are stronger in a certain way than any real central planner, because they have the authority to redistribute anything. A Soviet planner might assign a plant this many tons of some raw material, that much electricity, use of those parts of the transportation network. Money as the universal equivalent is a token granting the holder use of whatever they need. A loan then is a ticket to the entrepreneur saying, you have the authority to take whatever labor and other resources your project requires.

In this sense, markets are not an alternative to planning, they are a tool for planning. Money is the substrate within which planning takes place.

People used to talk about a “soft budget constraint” as a defining feature of the Soviet economy — enterprises could continue operating even if their costs exceeded their sales, as long as the planners saw some social value in their continued operation.2 Startups like the algae power company have the softest of budget constraints — they are able to incur substantial costs, often over many years, without any sales at all.

This is not some weird quirk of venture capital. This is a central purpose of finance – to direct society’s resources to one activity that has not yet been successful in the market, but that somebody think could be. The defining characteristic of an entrepreneur is that they undertake some new activity, something that is not already being done, with funding provided by someone else. An entrepreneur in this sense definitionally faces a soft budget constraint.

This is not, again, an anomaly, it is not a breakdown of the normal operation of capitalism. It is essential to what makes capital such a powerful force for transforming our material existence. And it needs to be central to our theoretical accounts of capital and of the investment process.

It certainly was for Keynes. As he famously observed in Chapter 12 of the General Theory,

a large proportion of our positive activities depend on spontaneous optimism rather than on a mathematical expectation, whether moral or hedonistic or economic. Most, probably, of our decisions to do something positive, the full consequences of which will be drawn out over many days to come, can only be taken as a result of animal spirits—of a spontaneous urge to action rather than inaction, and not as the outcome of a weighted average of quantitative benefits multiplied by quantitative probabilities.

Enterprise only pretends to itself to be mainly actuated by the statements in its own prospectus, however candid and sincere. Only a little more than an expedition to the South Pole, is it based on an exact calculation of benefits to come. Thus if the animal spirits are dimmed and the spontaneous optimism falters, leaving us to depend on nothing but a mathematical expectation, enterprise will fade and die;—though fears of loss may have a basis no more reasonable than hopes of profit had before.

It is safe to say that enterprise which depends on hopes stretching into the future benefits the community as a whole. But individual initiative will only be adequate when reasonable calculation is supplemented and supported by animal spirits.

Markets and the pursuit of private profit have existed for much longer than the their fusion with long-lived means of production command over wage labor that we call capital. One important reason for the failure of profit-seeking, through most of its history, to revolutionize production, is that these activities were subject to hard budget constraints and forced to adhere closely to market signals. Through most of their history, they couldn’t create new forms of production on the basis of dreams.

The algae company is getting access to real resources — authority over other people’s labor — because they have convinced a planner that their project is worthwhile.

Market socialists — whose belief in the virtue of markets is exceeded only, perhaps, by 19 year olds who have recently discovered Ayn Rand — like to ask how socialism can maintain the material accomplishments of capitalism without markets. But it isn’t markets that that produce the genuine and immense material accomplishments of capitalism.

The initial investments in AI or algae farming — or automobiles or airplanes or antibiotics — are not a response to market signals. They are conscious choices by some group of people to try something that hasn’t been done before. We might like algae and dislike AI (I do), but the solution is some substantive improvement in the planning system. It’s not an issue of planning versus markets.

Now, some people might say: This planning is based on the hope of future profit, it will eventually have to be validated by markets. But it is not incidental that the market outcome and the pursuit of profit are mediated by conscious planning.. They do not happen automatically. The judgement of the market can be deferred, in principle indefinitely.

We must also reject the idea that the assessment of future profitability is rational or objective. This is one reason the Levine story is useful – it focuses our attention on the ways that financing decisions are made in practice. Making energy from algae is cool! As he says, this an important part of the investment process. That should not be abstracted from.

There are many potentially profitable businesses that never get access to financing. The required return for most startups is very high, or effectively infinite. Manias may be essential to maintain an adequate level of investment. The irrationally high discount rate applied to future returns can only be offset by an irrationally high expectation of future profits. (See, as for much of this post, the current AI boom.)

Nor is it clear that future profit always is the motivation, certainly not the only one, and certainly in the early stages. It’s not incidental that Levine emphasis that algae energy could get funding in part because it is cool. It’s not, perhaps, incidental that OpenAI started its existence as nonprofit. The pursuit of profit is not always what motivates investment, especially when it involves fundamental departures from existing forms of production.

This conflict between the pursuit of profit and large-scale fixed investment goes back to the beginning of industrial capitalism. As Eric Hobsbawm observes in his classic account of the Industrial Revolution, the textile industry — small scale, labor-intensive — could develop through largely self-financed improvements on existing production methods serving existing markets.But the large-scale capital-goods industry, using novel techniques to serve a market that was only brought into existence by the Industrial Revolution itself, was a different story. There, the pursuit of profit was an inadequate spur in the absence of some additional non-pecuniary motive.

No industrial economy can develop beyond a certain point until it possesses adequate capital-goods capacity. … But it is also evident that under conditions of private enterprise the extremely costly capital investment necessary for much of this development is not likely to be undertaken… For [consumer goods] a mass market already exists, at least potentially: even very primitive men wear shirts or use household equipment and foodstuffs. The problem is merely how to put a sufficiently vast market sufficiently quickly within the purview of businessmen.

But no such market exists, e.g., for heavy iron equipment such as girders. It only comes into existence in the course of an industrial revolution (and not always then), and those who lock up their money in the very heavy investments required even by quite modest iron-works … are more likely to be speculators, adventurers and dreamers than sound businessmen. In fact in France a sect of such speculative technological adventurers, the Saint-Simonians, acted as chief propagandists of the kind of industrialization which needed heavy and long-range investment.

Th Saint-Simonians driving the investment boom of the 19th century, the rationalists and long-termists and Zizians driving investment in the 21st — perhaps it’s not such a far-fetched analogy. (Though personally I find Saint Simon more appealing.) However different the content, they are filling the same essential function. And that is the key point here — a system that relies on private initiative for irreversible commitments to projects that transform production, cannot be based on rational calculation, on objective market signals. The market outcomes of these kinds of projects cannot be known until long after the die is cast. A different kind of motivation is needed.

A related point: Nobody knows, right now, if the algae thing will work. Nobody knows if AI will turn out to be useful (I think not, or not very, but I am well aware I could be wrong.) The tradeoff is not about allocating real resources to their best use, among the known uses available. If the algae thing doesn’t get funding — and we can be sure that many, many projects as well founded are not getting funded — the reason will not be because society had a more urgent use for those resources. It will be because people couldn’t figure out a way to cooperate — that the mechanisms to convert promises (or dreams) into command over labor did not operate in that case.

(A flip side of this vision, which I can’t go into here but is essential to the larger argument, is that society has resources to spare. Many people’s time is being spent much less usefully than it could be.)

There’s another, more subtle point. It is not just that we don’t know how profitable these projects will be until someone finances them and they are carried out. There is not any fact of the matter about how profitable these projects will be, independent of how they are financed.

This is the point where Arjun’s and my argument may be challenging for a certain strand of Marxists. (It is not, I think, a challenge to Marx himself, who said a lot of different things on these questions, at different levels of abstraction.)

There is an idea — Anwar Shaikh offers a contemporary example — that the rate of profit is determined first, and then the rate of interest is secondary, a special case of profit, governed by it, or a deduction from it. But we can’t say what the profitability of the algae business even is, prior to the question of what terms it is financed. At one rate of interest it may be very profitable, at another less so or not worthier pursuing at all.

Now maybe you will say: sure, anyone can make a profit if they get that free Fed money. But it’s not just that. The relative profitability of different projects depends on the term on which they can be financed.

Let’s consider two projects. One will make energy from burning oil, the other from growing algae. The oil project is straightforward: 100 dollars laid today will yield 120 dollars worth of fossil-fuel energy a year from now. The algae project requires a lot more upfront costs — you have to first, you know, figure out how to make energy from algae. But your best guess is that $100 invested today will allow you to produce $50 worth of fuel from $10 worth of inputs every year starting 15 years from now.

So, which of these two projects should you commit your capital to? Which of them is more profitable?

The answer, of course, is that you can’t say until you know what terms the projects will be financed on.

Partly this is just a simple matter of discount rates. In these narrow terms, the algae project is more profitable if the interest rate is 5 percent; the fossil-fuel project is more profitable if the interest rate is 10 percent.

More broadly we have to consider, for instance, whether the financing will have to be rolled over, if, say, the project takes longer than expected. What are financing conditions are likely to be at that point? If the loan is due and can’t be rolled over and the project has not generated sufficient returns to repay it, then the return on whatever capital the undertaker put in themselves will be negative 100 percent. The chance of this happening — which, again, depends as much on future financial conditions as on the income generated by the project itself — has to be factored in to the expected returns.

We also have to consider the terms of the financing — what kind of collateral will be required? Will it have to be periodically marked to market? What control rights are demanded by investors or lenders? The viability of the project from the point of view of the person carrying it out depends as much on these considerations as on the physical problem of converting algae to energy.

I recall a Wall Street Journal article years ago – I’m sorry, I don’t have a link – on the economics of putting power plants on barges. There are technical issues pro and con, but the decisive advantage of putting a plant on a barge is that it is better collateral. Lenders are more willing to finance a power plant when they can physically tow it away in the event of default.

So if we are going to evaluate the profitability of a power plant on a barge versus one on land, we have to consider how important it is to keep lenders happy — how scarce or abundant financing is. We also have to consider other monetary factors. A big utility, or one guaranteed by a state, can be counted on to pay its debt, so collateral is less important than it is for a smaller business without public backing.

Another way of looking at this is that the distribution of profits has a variance as well as a mean. How much the higher moments matter, depends how confident we are that contracts will be honored in alls states of the world. It depends on how confident we are that short-term deficits can be financed and that only the long-term outcome matters.To the extent that that’s true, we should just focus on mean expected profits. But if defaults are possible, then the higher moments matter too — again complicating the question of what it means for one project to be more profitable than another.

This is the fundamental point Hyman Minsky was making with his two-price model. It’s why he insisted that money is not neutral. The price of long-lived assets depends on the interest rate (or as he put it, the supply of money), in a way that the price of current output does not. The price of a factory relative to the stuff coming out of it will shift as money becomes scarcer or more abundant.

And of course it’s not just two prices. It’s a whole set of prices, for capital goods that are more and less long-lived and are more or less specialized to particular production processes. The more scarce money is, the higher will be the price of the power plant on the barge relative to the power plant on land.

Again, this is not just a time discount. It’s a discount for uncertainty. It’s a discount for commitment. It’s a discount on hopes and dreams versus money on the table.

For every interest rate there is a different schedule of labor values. For every interest rate there is a different set of market signals. A tight-money market socialism does different things from a loose-money market socialism.

This is a version of Sraffa’s argument that one can’t calculate labor inputs for different commodities unless we already know the profit rate, which must be determined from outside the production process, for instance “by the rate of money interest.” Even if we assume that all production possibilities are already known and available, we can’t decide which are most profitable unless we know the terms on which production will be financed.

In the real world, again, the possibilities for production are not known in advance. And contrary to Sraffa’s preferred assumption of content returns to scale, industrial production tends to have increasing returns, implying the existence of multiple equilibria. But directionally, all these considerations point the same way. Easy money makes projects with longer-term returns, higher-variance or more uncertain returns, more specialized capital goods, more increasing returns, and greater departures from current production processes more attractive. Tight money, the opposite.

A central function of discourse around finance, and the stock market in particular, is to obscure this role of finance in shaping and directing production. The stock market creates the situation it pretends to reflect, in which one production process can be smoothly traded off against another.

If the algae-company investment is successful, it will eventually result in the creation of a listing on a stock market, creating a tradable claim on the future profits from algae trading. At that point, income from algae energy will have a market price reflecting its exchangeability with all sorts of other incomes. You will be able to swap one future dollar of algae-energy income with a future dollar of income from any of thousands of other listed companies. It is tempting to treat this as simply a fact of nature, to retroactively project it back to the whole process of building this company, and treat it all as a process of market exchange just like swapping one share for another.

That the delimitation of exchangeability is a distinct problem from the allocation of real resources — that, in a sense, is what our book is about.

At the New School: Against Money

This is the edited transcript of a talk I delivered on March 5 at the Heilbroner Center for the Study of Capitalism at the New School for Social Research in New York, at the invitation of Julia Ott. The talk is an attempt to explain what Against Money (my forthcoming book with Arjun Jayadev) is about, and why it matters. Earlier attempts can be found here and here. You can listen to the full recording of this talk, including some quite interesting questions from the audience, here:

 

Since we are at the Heilbroner Center, I thought I would begin with Robert Heilbroner. 

Heilbroner is best known for his book, The Worldly Philosophers, a popular history of economic thought. There’s an interesting discussion in the introduction to later editions of the book about his struggle to come up with a title for it. 

He did not want a title that included the word economist — he understood that a book about economists would have, at best, limited appeal. His initial thought was to call it “The Money Philosophers.” But after considering that, he decided that it didn’t really fit his subjects, because, money, for the most part, was not a major concern for them.

I think he was right to have those misgivings, and to instead choose the title he did. Because money, perhaps surprisingly, plays a rather small part in the history of economic thought. 

The dominant view on money among economists, which you can find in almost unchanged from the 18th century down to any contemporary textbook, is that money is neutral. There is a real economy, a concrete existing world of labor, of technology, of human needs and of resources that can meet them, which all exists prior to and independently of money. It’s in this real world that relative values are established, and where the possibilities for production exist prior to any sort of measurement in terms of money. Things would be exchanged in the same proportions in the absence of money, or with any other difference form or quantity of money. Money is at best a numeraire,  a mild convenience to help us describe relative values and simplify exchange that would happen on essentially the same terms without it. 

Going back to 1752, we find David Hume writing:

Money is nothing but the representation of labour and commodities, and serves only as a method of rating or estimating them. Where coin is in greater plenty; as a greater quantity of it is required to represent the same quantity of goods; it can have no effect, either good or bad…

What we have here is the idea, first, that there is a quantity of goods already existing in the world before we measure it or rate it with money, and second, that the use of money to coordinate the exchange of goods, to measure the quantity of goods, has no effect on that quantity, either good or bad. 

Now Hume himself went on to complicate this argument in interesting ways. But for many economists down to the present, this is where the story stops.

Variations on this are the central throughline in economic thought around money. Coming down to our century, we find Lawrence Meyer, who was recently a member of the Fed’s Federal Open Market Committee, saying,

Monetary policy cannot influence real variables, such as output and employment. This is often referred to as the principle of neutrality of money. Money growth is solely the determinant of inflation in the long run. Price stability, in some form, is the direct, unequivocal, and singular long-term objective of monetary policy.

Again we see the same notion that control over money or credit cannot affect real outcomes, such as output or employment. At most, it can affect the measurement of those outcomes in terms of prices, that is, inflation.

I could multiply many similar quotes from the centuries in between these two. The great exception  is, of course, Keynes.

If you got an economics education in the Keynesian tradition, as Arjun Jayadev and I did at the University of Massachusetts, then you probably spent a great deal of time thinking about money. You might even have imagined yourself as a money philosopher, or on the path to being one, or at least you were interested in what the money philosophers had to say. And you will have seen, more or less clearly, that there’s an important connection between the organization of money, the form of money, and real outcomes in the economy. 

As Keynes himself put it in a 1932 article, which was arguably the opening salvo of the Keynesian revolution, the theory he was looking for was

a theory of an economy in which money plays a part of its own and affects motives and decisions and is one of the operative factors in the situation so that the course of events cannot be predicted, either in the long period or in the short, without a knowledge of the behavior of money. 

The Keynesian vision is one where the operation of money is central in driving real outcomes, that money plays an active organizing role in the economy, and that one can’t understand real outcomes without an understanding of money. 

Of course, Keynes was not by any means the first person to think this way, to think that the world of money and the concrete organization of production cannot be separated. There’s a kind of samizdat tradition, “the army of cranks and brave heretics” that Keynes acknowledges as his predecessors, who have made similar arguments. 

One very interesting early figure in this tradition is John Law. John Law is remembered today as a sort of con artist, or as an early example of the dangers of trying to manipulate real outcomes by the use of money, because of his proposals adopted by the French government to set up a bank that would issue paper currency backed by land in the New World and other proposals for financial reform, and for what we might even today call industrial policy. 

These proposals were not successful. Their failure contributed to the problems of the French monarchy in the 18th century. But the interesting thing about him is that he was not just a monetary reformer, that he was a genuine theorist. Joseph Schumpeter even puts him in “the front rank of monetary theorists of all time.”

Law’s proposals were motivated by a vision of money, as he put it, as not being merely “the value that is exchanged” but “the value in exchange” — the activity that happens through the use of money creates new value that does not exist prior to it. Coming from a background in Scotland, he writes about a situation where there is both vacant land and idle labor. They can’t be put together, they can’t be used productively, in the absence of money — to provide coordination, as we would say today.

The existence of coordination problems, creates the possibility that money is not just a yardstick for exchanges that would have happened regardless, but opens up new possibilities for cooperation — that there can be new value created by money that did not exist in the world prior to it. This is the opposite of the argument made by Hume and others and in principle opens up the possibility of creating real wealth, of transforming the real world through the manipulation of money. 

We can trace a line forward from Law to Alexander Hamilton, a more successful advocate for financial reform in the context of a program of national development. Hamilton is not usually thought of as an economic theorist, but his writing in the “Report on Manufactures” and other proposals for developing American industry drew importantly on a vision of a more elastic and flexible monetary system.

Interestingly, one suggestion that Hamilton made for increasing the supply of “monied Capital” was for the federal government to permanently maintain a large debt. Anticipating contemporary heterodox economists, he argued that rather than crowding out private investment, federal borrowing would in effect crowd it in, because government debt was a close substitute for money — a source rather than a use of liquidity, as we might say.

We can follow this line on to Henry Thornton and the anti-bullionists in the early 19th century, who saw a flexible system of bank money as better suited than a rigid gold standard for promoting real economic activity. And then on to Thomas Tooke, who Karl Marx considered “the last English economist of any value,” and to  Walter Bagehot and American monetary economists like Allyn Young, and then on to Schumpeter and of course Keynes himself and his successors. 

What do these heterodox thinkers on money have in common? 

From our point of view, first, they all see money not as a distinct object existing in a definite quantity, but as one end of a continuum of financial instruments or arrangements. They see money as a subset of credit. Schumpeter says that when thinking about money we “should not start from the coin,” we should not start from the discrete object that we call money. Rather we should, as all of these thinkers did to one degree or another, imagine a whole system of credit arrangements, some of which can be classified for various purposes as money. He distinguishes a “money theory of credit,” which most economists hold, from a “credit theory of money,” which is what he prefers. The starting point, the atomic unit, is the promise, not the exchange.

Second, and this is a central theme of our book, these thinkers all saw the interest rate as the price of money, rather than the price of savings. An important part of John Law’s argument for his financial reforms was that it would allow a lower rate of interest by making money more abundant. Walter Bagehot insisted that interest was the price of money, not of saving as orthodoxy has it.

The liquidity theory of interest is arguably the analytic keystone of Keynes’ General Theory. This question of whether the interest rate represents a real constraint, a trade-off between stuff today and stuff tomorrow, the price of savings or loanable funds, versus whether it is a fundamentally financial price set in financial markets as the price of money or liquidity, is a  through line in debates over money. 

More broadly, there is the idea of money as a facilitator or enabler of economic activity, as a vehicle for transformation of the real world, versus the idea of money as a passive measuring rod or numeraire. Connected with this is the idea that money requires some form of active management. The orthodox view of money, along with seeing it as fundamentally or at least ideally neutral, has always looked for some kind of automatic rule to regulate credit and money. 

Going back to Hume again at the beginning of this tradition, he at some points argued that banks should not exist. He wrote that the best bank would be one that took coins and kept them locked up until their owner came back for them, without creating credit in any form.

That is the extreme version of this position, but in less extreme forms there’s a constant attraction to the idea that bank credit should reproduce some natural logic of exchange, and not have any independent effect on economic activity. We can see it in the 19th century in the form of the real bills doctrine and of the gold standard — two different approaches to creating an automatic mechanism for regulating the creation of money and credit. Later in the century there were ideas of strictly capping the amount of paper money that could be produced, or separating the lending and payments functions of banks — an idea that constantly recurs in right-wing ideas for monetary reform. Behind this there was often the idea of an “ideal circulation,” where whatever the concrete form that money took, it should mimic the behavior of a pure metallic currency. 

Then in the 20th century we get Milton Friedman’s idea that central banks should follow a strict money supply growth rule — an updated version of the cap on banknote issuance imposed on the Bank of England in the 1840s. And more recently we have the Taylor rule and similar rules that are supposed to guide the behavior of central banks. Some right-wing legislators have even proposed writing the Taylor rule into law, so the Federal Reserve would no longer have any choice about monetary policy. 

What all these rules have in common is the idea that there is some kind of autopilot that you can put the management of money and credit on, so that it no longer involves any active choices, public or private — so that money will manage itself. 

This goes with the idea that even if money is not always neutral in practice, that it ought to be neutral. It goes with the the idea that there is some set of natural outcomes dictated by the real material choices facing us, by the problem of scarce means and alternative ends that Lionel Robbins defined as the problem of economics, that there is an objective best solution to the trade-offs facing us as a society —  and if money is telling us to do something else or allowing us to do something else, that is a problem. We need to make money automatic so that we can return to this genuine non-monetary set of trade-offs that we are trying to solve. 

In other words, when we think of money as neutral, that implies a specific kind of views about social reality in general. If we think of money as a transparent window onto a pre-existing world of goods, a pre-existing set of relative values, a pre-existing set of opportunities and resources facing us,  then we are going to see the world itself as fundamentally money-like. We are going to see the existence of prices, the division of social reality into discrete commodities with ownership rights attached to them, as a basic fact about the world, which money is simply revealing to us. 

When we see money as a distinct institution, as a distinct social technology of coordination, then we can see the rest of the world as being different from that. We can see all the ways in which the process of production, all the ways we organize our society are different from what happens in markets and different from what is mediated by money. We can see the world not as a set of existing commodities that need to be allocated to their best use to satisfy human needs but as an open-ended collective project of transforming the material world. 

This second view is what Keynes called the monetary production paradigm. 

In the 1932 article that I earlier suggested could mark the beginning of the Keynesian revolution, Keynes distinguished a real exchange view of the economy from a monetary production view. The real exchange view he associated with the traditional view of money as neutral — it’s a vision of a world in which fundamentally the economic problem is barter. So for instance Paul Samuelson’s famous textbook, the most influential economics textbook of the 20th century, says that we can reduce essentially all economic problems to problems of barter. 

In this world, the economic process is fundamentally about exchanging real things. Production is just a special case of exchange. You put in your  capital, I put in my labor, we get a definite amount of output out that we divide in proportion to what we put in, on terms that we all knew and agreed on in advance.

The real exchange view of production was perfectly expressed by Keynes’ Swedish contemporary Knut Wicksell, the originator of  the modern approach to monetary policy. He described economic growth as being like wine aging in barrels. We’d like to drink the wine today, because that would be nice; but on the other hand if we leave it to age in the barrel for longer it will improve in quality. The wine is already there, we know how much there is and how much better it will be next year. All the possibilities are defined in advance. We just have to decide what pace of drinking it will bring us the most pleasure. 

A monetary production view of the world, on the other hand, is one in which the economic process is a one of collectively transforming the world. This is an active process that structured and mediated by money, and organized around the accumulation of money.  In this view of the world, production is a cooperative human activity whose possibilities are not knowable in advance. 

In this monetary-production paradigm, the fundamental constraint is not scarcity; the economic problem is not allocation. The fundamental constraint is coordination. When we stop imagining the world in terms of discrete commodities being combined in different ways, and start imagining it in terms of human beings cooperating (or not) to do things together,  the problem becomes: How do we coordinate the activity of all these different people? What does it take to allow cooperation on a larger scale, between people who don’t have pre-existing relationships? 

That is the problem that economic life is seeking to solve. And in particular, we argue, it is the problem that money helps solve. By its nature, this is not a problem that we can know where the opportunities are in advance. This uncertainty about the possibilities of the future is a fundamental component of Keynes’ vision, and is linked to the centrality that money has in his vision. 

So far all of this has been pretty abstract. Let’s turn now to some of the implications of these questions for the real world. Because, after all, these debates are only interesting insofar as they help us become masters of the happenings of real life. They’re interesting insofar as they give us some ability to intervene in the world around us. The reason that Arjun and I wrote this book is that we came to feel that many of the concrete problems that we were interested in, and that other people are interested in, require a different view of money to make sense of them. 

Let me give an example. The two of us wrote a number of papers some years ago, which were in some ways the starting point of this book, about the rise in household debt between 1980 and 2007. Between 1980 and 2007, household debt in the United States rose from roughly 50 percent of GDP to 100 percent of GDP. This was something you were very aware of if you were beginning your life as an economist in the 2000s, and it became even more interesting in the wake of the financial crisis of 2007–2009, which the rise in household debt seemed like one of the underlying causes of. 

In general, when people talk about rising household debt they attribute it to rising household borrowing. Much of the time, people don’t even realize that those are two different things. There are articles where the title of the article is something like “explaining the rise in U.S. household debt” and then the first sentence of the article is, “why are U.S. households borrowing more than before?” Or even, “why are households saving less than before?” But these are different questions!

Of course it is true that insofar as someone borrows more money, their debt will rise; and if their income is unchanged their debt to income ratio will rise. This might in principle involve dis-saving, if the debt is financing increased consumption. In reality, though, it almost certainly doesn’t, since the great majority of debt is incurred to finance ownership of an asset. 

Setting aside the dissaving claim — which is almost always wrong, though you hear it very often — it is true that an increase in borrowing implies an increase in debt. But your debt-income ratio can change for other reasons as well.

Think about two people who buy houses: If one person buys a larger house, or a house in a more expensive area, or if they make a smaller down payment, then they will certainly owe more money over time than the other person. But if one person buys a house when the prevailing interest rate is low and the other buys an identical house with an identical downpayment when interest rates are high, and they each devote an identical part of their income to paying their mortgage down, then over time the debt of the person who bought when interest rates were low will be lower than the debt of the person who bought when interest rates were high. If you are fortunate enough to buy a house with a low mortgage rate then over time your debt will be lower than somebody who wasn’t so fortunate.

This is even more true in the aggregate. If you see households devoting a certain share of their income to purchasing the services of homes that they live in that they own, those same payments are going to result in in more debt when interest rates are high and less debt when interest rates are low. 

We also know that if you’re looking at a debt to income ratio, then as a ratio that has a denominator as well as a numerator. A more rapid increase in incomes — either what we call real incomes or incomes that rise because of inflation — will reduce that ratio of debt to income. And we know that if debt is written off, if the borrower defaults, then the debt ratio will also come down. 

All of these are factors that influence the level of debt independent of what we think of as the real flows of expenditure and the income. So what Arjun and I did — which is very simple once you think of doing it — is take various periods of time and see how much of the change in debt income ratios over each period is due to changes in borrowing behavior and how much is due to these other factors. We called the other factors, the ones independent of current expenditure and income, Fisher dynamics, for Irving Fisher. 

Fisher, incidentally, is an interesting figure in this context. On the one hand he was a very important advocate of this sort of neutral-money real-exchange vision we are criticizing. But he also in the 1930s wrote very persuasive account of the Great Depression in terms of financial factors — “The Debt Deflation Theory of Great Depressions” — where he explained the depth of the Depression by the fact that debt burdens rose even as borrowing fell, because prices and nominal incomes fell much faster than interest rates 

Our point was that this dynamic is not unique to the Great Depression. Any time you have higher or lower inflation, or higher or lower interest rates, that is going to affect debt burdens exactly the way it did in the Depression. And what we found is that if you’re looking at this rise in household debt to income ratios between 1980 and 2007, essentially all of it is explained by these other factors, these Fisher dynamics, and none of it is explained by increased borrowing. If you compare the period of rising household debt after 1980 to the previous two decades of more or less constant debt-income ratios, people were actually borrowing more in the earlier period than in the later period. 

The difference is that the interest rates facing households were much lower in the 1960s and 1970s than they were after the Volcker shock. The Volcker shock raised interest rates for households, and they stayed high for longer than the policy rate did. And during the 60s and 70s compared with the 1980 to 2007 period as a whole, inflation was significantly higher. (Real income growth was also a bit higher in the earlier period but that plays a smaller role.) 

So what we have here is not a story about real behavior. It’s not a story about borrowing, about income and expenditure. All of these stories that we heard from both the left and the right about why household debt had risen — it’s because people have grown impatient, their time preferences shifted or they are competing over status or it’s inequality — none of this is relevant, because people were not in fact borrowing more. 

Stepping back here, we can think of a set of monetary variables that scale up or scale down the weight of claims inherited from the past. Both interest rates and inflation function to change the value of claims in the form of debt inherited from the past, relative to incomes being generated today; and by the same token interest rates change the value of promises about future payment relative to incomes today. In an environment of abundant credit and low interest rates a promise about something you can deliver in the future, or an income you will receive in the future, is more valuable — it gives you a greater claim on income today. In an environment of low interest rates, what you will do, or can promise to do, in the future matters more; in an environment of high interest rates, and low inflation, what you did do in the past, the income you did receive, matters more.

This monetary rescaling of claims inherited from the past and claims generated by promises about the future, relative to income in the present — this is something that is constantly going on, in addition to whatever real activity people are carrying out. And many of the monetary outcomes that we’re interested in — like debt-income ratios — are fundamentally driven by this rescaling process and not by real activity. 

So these historical changes in household debt are a concrete application of the larger perspective that we’re trying to develop in this book. 

Another important application is the interest rate. How we think about the interest rate is central to a lot of the debates between different perspectives in economics, or maybe more precisely, it’s where the differences between them become visible, become unavoidable. 

One way I think about it: Imagine trying to lay a flat map over globe. You can do it  if your map is of just a little portion of the globe — we all know we have flat maps of various places that all exist on a sphere in reality, and they work okay.  But if you try to put your flat map over the whole globe it’s not going to work — either you’re going to have to crumple it up somewhere or it’s going to rip somewhere. The interest rate then is one of the sites where the flat map of this vision of the economy as a process of market exchange rips, when we try to fit it over a world of active transformative production through human cooperation into an unknown future. 

The way that you’re taught to think about the interest rate, if you get an economics education, is that it’s the price of savings, or loanable funds — it’s a trade-off between using the pot of resources that currently exist for consumption or for making the pot bigger in the future. We think, so much stuff was produced, some people have it, and if they don’t need it right now they can lend it to somebody else who’s going to use it to carry out production, which will mean more stuff in the future. In this view the interest rate is the price of consumption today in terms of consumption tomorrow. 

Interest, in this view, is a fundamentally non-monetary phenomenon: It’s a question of the real trade-offs imposed by people’s material needs and the material production they’re capable of.

This is a long-standing view — we can go back 200 years to Nassau Senior describing interest and profit as the reward for abstinence. By “abstinence” he means the deferring of enjoyment. The term has a nice moralizing religious tone to it, but the fundamental point is that the interest rate is the return on consuming later rather than earlier. We can find exactly the same thing in, let’s say, Gregory Mankiw’s textbook today. To quote:

Saving and investment can be interpreted in terms of supply and demand. In this case, the ‘good’ is loanable funds, and its ‘price’ is the interest rate. Saving is the supply of loanable funds    Investment is the demand for loanable funds—­ investors borrow from the public directly by selling bonds or indirectly by borrowing from banks. 

Here, again, we have a certain amount of stuff — it already exists  — and you can either use it now, or defer your enjoyment of it by lending it to somebody else who will use it productively. One striking thing about Mankiw’s formulation is that he makes a point of saying that it’s a matter of indifference whether this happens through banks or not. 

So in this vision, the interest rate is a trade-off between goods today and goods tomorrow, or goods used in consumption and goods used in production. But the fundamental problem, as soon as we start thinking about this in a real-world setting, is that it doesn’t seem to match up at all with the interest rate as we actually observe it.

One of the first things you learn if you get a Keynes-flavored economics education, but also something that anyone who deals with this stuff practically realizes, is that when you go to the bank to get a loan, the bank is not making that loan out of anybody’s savings. A bank makes a loan by creating two offsetting IOUs. There is the bank’s IOU you to you, which we call a deposit, and your IOU to the bank, which we call a loan. The deposit is newly created in the process of making the loan — it’s what used to be called fountain pen money, it’s ledger money, it consists of two offsetting entries in a ledger. Nobody’s savings are involved. Nobody else needs to defer their consumption to allow you and I to write IOUs to each other.  

There’s a very nice explainer from the Bank of England on how banks create money which you can look up online, that lays this out very clearly. I assign it to my undergraduates every year. It’s not a secret that loans, in the real world, do not involve somebody taking some goods that they have in their possession and bringing them to some kind of central clearing house where somebody else can check out the goods to use in some production process. When you get a loan, you’re not receiving a bag of cash that someone else brought into the bank. You’re getting a deposit, which is just a record kept by the bank. Fundamentally, a loan is the creation out of thin air of two offsetting promises of money payment. 

Now of course when you receive your promise from the bank — in other words, your deposit — you will normally use that to acquire title to some goods and services, or authority over somebody else’s labor. But the loan itself did not require anyone to have already decided to let you use those goods. It did not require anyone’s prior act of saving.

Of course anybody can write an IOU. You and I could sit down and write promises to each other, just as you and the bank do when you get a loan. The key thing about the bank, here, is that its promise is more credible than yours. If I ask for your bicycle and promise to give you something of equal value down the road, you probably won’t agree. But I can make that same promise to bank, and the bank can then make that promise to you. And that’s fine. 

This is why Hyman Minsky, the great theorist of finance, said that the defining function of banks is  not intermediation, but acceptance. You can’t get a claim on labor, on real resources, simply by promising you’ll do something useful with them. But a bank might accept your promise, and then the promise that it makes to you in return can can be transferred on to other people in return for a claim on real resources, which you can use to create new forms of production that otherwise wouldn’t exist. And this is the other side of the Keynesian vision — the fact that banks can create money by lending allows for the reorganization of productive activity in new ways that wouldn’t be possible otherwise.

If you’re a business owner, say, you can now expand your business, because the bank’s promise is more credible than your promise. You as a business owner cannot hire workers simply by saying this business is going to be successful and I’ll give you a share in it — well,  if you’re in Silicon Valley sometimes you can, but most businesses can’t. The bank’s promise is more credible — unlike yours, it will be accepted by workers as payment. You can use this loan created out of thin air to carry out new activities, to create things that did not exist before.

The problem for the orthodox view is that banks exist. Banks exist and, to anyone taking a naive look at capitalism, they seem rather important. Trading money claims is evidently pretty central to the way that we organize our activity. 

Central banks also exist, and influence the terms on which banks make loans, even though they themselves don’t do any saving or investing. If you believe the story in the Mankiw textbook that the supply of savings is being traded against the demand for investment and that’s what determines the interest rate — well, a central bank is neither providing loanable funds nor is it using loanable funds for investment, and it doesn’t restrict the terms on which anyone is allowed to make private contracts. So how could it influence the price of loanable funds?

Wheres if we think of the interest rate as being a combination of the price of liquidity — flexibility — and a conventional price set in asset markets, then it is much easier to see the critical role of banks, and why central banks are able to influence it.  This is something we spend a lot of time on in the book.

Now, once common way of reconciling the idea of a savings-determined “real” interest rate with the monetary interest rate we see in the real-world financial system is through the notion of a “natural interest rate”. This is the idea that, ok, there is here on Earth an interest rate that is set within the banking system that has to do with the terms on which promises of money payments are made. But there’s another interest rate that exists in some more abstract world, which we can’t see directly, but somehow corresponds to the way goods today trade off against goods tomorrow, or the way they would trade off if markets functioned perfectly. This second interest rate is what’s called the natural rate. The actual rate might not always follow it. But it should. 

As an aside, I should say that this sort of transformation of a descriptive claim, that is supposed to be a statement about how things actually work, into a prescriptive claim about how things should work, is very common in economics. 

We can find a very nice statement of this view from Milton Friedman on the natural rate of interest and its cousin the natural rate of unemployment, where he describes them as the rates that would be

ground out by the Walrasian system of general equilibrium equations, provided there is embedded in them the actual structural characteristics of the labor and commodity markets, including market imperfections, stochastic variability of demands and supplies, the cost of information about job vacancies and mobility, and so on.

In other words, if we could somehow make a perfect model of the economy, then we could calculate what the natural rate would be, and that’s the thing we should be trying to achieve with our policy influencing the interest rate. Obviously, as soon as you start thinking about it, this doesn’t make sense on multiple levels. But it’s a very attractive formulation precisely because it papers over this gap between a theoretical and ideological vision of interest that sees it as a real trade-off between the present and future, and the actual concrete reality of interest that is determined in financial markets on the basis of liquidity and convention. 

So again, if you come more recently, you look at Jerome Powell talking about monetary policy in a changing economy, a speech he gave a few years ago. There he introduces the idea of r*, the natural rate of interest, by saying, “in conventional models of the economy, major economic quantities such as inflation, unemployment, and the growth rate fluctuate around values that are considered normal, natural, or desired.” 

I think that’s a very nice illustration of the thinking here, because normal, natural, and desired are three different things, and this r* is conflating them all together. Which is it? Is it normal, as in typical or average? Is it natural? (What would it mean for an interest rate to be artificial?) Or is it desired? In fact, it’s whatever the central bank wants. But the slippage between these different concepts is essential to the function of ideas like the natural rate. 

Think of the transmission in a car: You’ve got a clutch, because the engine is turning at one speed, and the wheels are turning at a different speed. If they just join up, you’re going to shatter your drive shaft. So you have two discs that can turn independently of each other, but also exert some force on each other, so you get a smooth connection between two systems that are behaving in different ways. In this case r* is the clutch between theory that’s going one way and the reality, which the central bank has to acknowledge is going in a different way. The ambiguity of the term is itself normal, natural, and desired.

So then Powell continues, these natural values are “operationalized as views on the longer-run normal values of the growth rate of GDP, the unemployment rate, and the federal funds rate, which depend on fundamental structural features of the economy.” Here again there is a conflation between the things that the central bank is trying to do, things that are the sort of normal, average, expected, long-run outcomes, and things that are in some sense determined by some set of non-monetary fundamentals independent of monetary activity. And again, you get a controlled slippage between these different concepts.

There’s another nice version of this from a group of economists associated with the European Central Bank. They say, at its most basic level, the interest rate is the price of time, the remuneration for postponing spending into the future. So this, again, this is Nassau Senior.

It’s abstinence. It’s the price of waiting for your enjoyment. So this sounds like something that should be purely non-monetary.

This is r*. And then the ECB economists say, “while unobservable, r* provides a useful guidepost for monetary policy as it captures the level of interest rates which monetary policy can be considered neutral.” 

I just love the idea of an unobservable guidepost. It’s a perfect encapsulation of how the natural rate concept functions. 

Because, of course, what’s really going on here is the central bank sets the interest rate at a level that they think will achieve their macroeconomic objectives, whatever they are. Inflation is too high. We need a higher interest rate. Unemployment is too high. We need a lower interest rate. Maybe we’re concerned about the exchange rate. Maybe we’re concerned about the state of financial markets. Whatever they’re most worried about, they choose an interest rate that they hope will help. 

And then after the fact, they can say, well, we wrote down a model in which this would be the interest rate, so therefore it is the natural interest rate. There’s no genuine content there — r* and the associated models are just a way of describing whatever you’re doing as conforming to a natural outcome that is dictated by the fundamentals out of your control, as opposed to a conscious political choice that prioritizes some outcomes above others. This sort of ideological construct is fundamental in depoliticizing one of the main sites of economic management in modern economies. 

And this is an important part of the story that we’re trying to tell in this book. The problem, if you believe in a more egalitarian, democratic, or socialist vision of the economy, is not simply, is not even mainly, that right now the world is organized through markets, and we’re going to have to come up with some better economic system to replace markets. The reality is the world is not primarily organized through markets. What we have, very often, are imaginary market outcomes being claimed as the unobservable guideposts so that people with authority claim to be following them. We have an ideological system that allows processes of power and planning to present themselves as somehow representing or standing in for market outcomes. 

Another area where I think this comes through very clearly is in the history of the corporation. We wrote a lot on this which we were, unfortunately, not able to fit into this book — it will be in another book. But it’s a good illustration of the larger vision we are trying to develop.

If you look at the way people talk about our economy, almost across the political spectrum, they will describe it as a market economy. We have all kinds of outcomes that are dictated by markets, decisions about production are guided by prices, the economy is organized through market exchange. 

And, at least among economists, the way we talk about production implicitly treats it as just a special kind of market. 

This is certainly the way economic textbooks approach production. We talk about labor markets, and capital markets. We imagine production as a process where someone purchases a certain amount of labor and a certain amount of capital, puts them in a pot, and gets a certain amount of salable output at the other end.

But when you look at how corporations work, it’s very clear that they are not organized as markets. They’re not internally structured through money payments — yes, of course, workers have to paid a wage to show up, but once they are there there isn’t some kind of market for their services. The boss just tells them what to do. Nor are corporations organized internally around the pursuit of profit, though that obviously guides how they relate to the outside world.

Now, historically, we can find cases of businesses whose internal structures are more market-like. Some of the first large corporations were organized through what were called inside contractors. You would you hire a skilled craftsman, artisan, who comes and works in the physical space, but is responsible for hiring their own assistants, buying their own materials, working them up and then selling them on to  the next inside contractor. 

That turned out to be not a very good of organizing a corporation, even when they were they producing the sort of thing — clothing, say — that could in principle be made by independent artisans. It didn’t work at all for large-scale industrial production. It’s obviously not the way corporations are organized today. We would argue that a central through-line of the history of the corporation is a fundamental conflict between the organization of production in large-scale, ongoing, socially embedded forms, and the logic of money and markets that surrounds them, and that the claims upon them by wealth holders continue to be exercised through. 

If we go back to what many people would consider the first modern corporation, the East India Corporation, we find right at its beginning the first conflict between shareholders and managers. The original structure had been a kind of pooling of resources between a number of independent merchants for joint operations in the East for 20 years, after which they would sell any remaining assets, divide up the profits, and dissolve the corporation. That was the legal form. 

But the East India Corporation turned out to be very successful at its mix of trade and piracy. People have argued that this hybrid of trade and warfare was really Europe’s specialty, the one thing it did better than the rest of the Old World. In any case, East India Company was very successful at it. But — and this is the key thing — it required a big investment in forts, soldiers, local political alliances. Things that can’t just be sold off and divided among the partners.

So after 20 years, this is a very successful enterprise, and the people running it would like to keep operating it and believe they can do so profitably. And now the shareholders are saying, it’s time to divide everything up. But of course, if you sell off the forts and so on, they’re no longer of any value. And so there was a long conflict —legal, political —  that ended with the managers winning, the shareholders losing, and the corporation being allowed to continue operating. 

Losing the legal fight turned out to be good news for the shareholders. The company  continued paying out large dividends. It never once raised any funds in the stock market. It continued operating and paying dividends for hundreds of years out of its own profits.

There are two interesting things about this story, to me. 

First of all, right from the beginning, we have a conflict between an ongoing process of production which has real material benefits, and the claims by the elite against that process, which they would like to exercise in the form of money. If you operate forts and you have ships and you have your local allies, then you can carry out trading and trading-slash-piracy activities that you can’t do without those things. But once you’ve laid out money to build a fort, you own a fort. It remains a fort. You can’t turn it back into money. And you, as a wealth owner, put your money out to get more money. You don’t want to be master of a fort. You want a liquid financial claim that you can trade. 

The other point is that the financial side of the operation is not about pooling money. It’s not about raising capital. 

The East India Company, again, continues having shareholders, continues paying dividends in order to satisfy their claims, despite never raising funds from the stock market over the next 200 years of their existence. Whatever the stock market is doing here, it’s not a system for getting real resources into the corporation. 

We can find this same principle down through the history of the corporation. When in the beginning of the 20th century we see the generalization of the corporate form, it’s not a process where large-scale investment required raising more funds. The problem that the corporation is solving is that you have large-scale enterprises with long-lived specialized fixed assets, on the one hand, and wealth owners, on the other hand, with claims on those enterprises — often the owners of smaller enterprises that merge into one larger one, or the heirs of the founder — who don’t want an interest in this particular company. They want money. And so the function of the corporate form is to allow the conversion of ownership rights into money — to enable payments that will satisfy these claimants, so that their authority over the production process can be pooled, their smaller interests can be assembled into a larger whole. 

This is not a system for raising funds for investment. It’s a system for consolidating authority. It’s a system for reconciling the need for large-scale, long-lived organizational production, on the one hand, with the desire of the wealthy to hold their wealth in a more money-like form, on the other. As William Lazonick says, the corporation is not a vehicle for raising funds for investment, it’s a vehicle for distributing money to the wealthy. The origin of the corporation as we know it is as a vehicle for moving funds out of productive enterprises to asset-owners. 

We can see this same conflict in the shareholder revolution of the 1980s, where people like Michael Jensen argued that the existing managers of corporations were too focused on the survival and growth of the enterprise as such. Managers were too interested in the particular productive process that they were stewards of, as opposed to generating money payments to shareholders, to finance.

What we see again and again is that  production depends on ongoing relationships — many of them, obviously, hierarchical, others based around cooperation, or on what David Graeber calls baseline communism, or on people’s intrinsic motivation to do their work well. But not on arm’s-length market relationships. 

Our argument is that, yes, under capitalism, money expands itself by being committed to production. But there is a fundamental conflict between the logic of production and the logic of money. 

Through the whole history of capitalism we have this conflict. Owners of money want more money. So they commit their money — their claim on society — to some particular enterprise, which they hope will return more money to them in the future. But in the meantime, the participants in that enterprise want to operate it, expand it, according to its own particular logic. Almost everyone here has probably encountered Marx’s formula M-C-P-C-M’. But the point that Arjun and I are trying to call attention to, is, how, or whether, C’ turns back into M’ is a tricky political question. 

From the point of view of  particular enterprise, the conversion back to money appears as a kind of imposition, a demand from outside. The enterprise can reproduce itself on its own terms with a claim on certain use values for which it produces other use values in return. 

Where money is necessary — this is important — is where something new is being done, where there’s a need to organize production in some new way, for coordination between strangers who don’t have a relationship with each other. Money is genuinely productive insofar as the development of our productive capacity requires breaking up existing ways of organizing production, dissolving existing relationships, extinguishing obligations, and starting from square one. 

Money should be seen as a specific kind of technology of social coordination. It’s a way of organizing human activity in new ways that it hasn’t been organized before. 

One way to think of this is of money as a sort of catalyst. On the one hand, it acts as a social solvent. It breaks up existing relationships, as Marx and Engels famously described in the Communist Manifesto — “all that solid melts into air”. It replaces social ties with the callous cash nexus. 

We can all think of examples of this. Money is a way of erasing relationships. A money payment replaces some ongoing connection between people. It takes an existing obligation and it extinguishes it. Money is a tool for breaking social ties, for replacing production that’s organized through ties of affinity, of affection, of kinship, of obligation, with arms-length cooperation between strangers, who could walk away from each other and never see each other again. Money says, we are done, we are settled, we owe nothing more to each other. 

But that is only the first step. Because after we have broken up these smaller social molecules, these smaller-scale structures of production, after we have broken up the organization of production through a family, a village, a guild, that is not the end of the story. 

Money facilitates cooperation among strangers, and it makes strangers out of family and friends. But people do not remain strangers. People who are engaged in cooperative activity of whatever kind form new social ties and new connections. This is partly because, organically, human beings connect to each other, and partly because the activity of production requires it. 

Production requires cooperation beyond what you can get through arms-length transactions. It requires intrinsic motivation, it requires trust, it requires people’s desire to do their job well and their loyalty to other people. And it requires, at least in our society, command and hierarchy, which in turn requires some form of legitimacy. People have to know who can give what commands. 

All of that involves the creation of social relationships. You can see money as a moment, in which older, smaller-scale forms of cooperation are broken up, creating the possibility for the reassembly of their components into larger forms of cooperation, larger-scale cooperation. The organization of society through money is a temporary stopping point. 

What’s interesting is that if you go back to the  late 19th century, the early 20th century, this was something many people perceived as almost inevitable. If you read the next-to-last chapter of Capital,  Marx’s vision is essentially this: Having broken up the older forms of small-scale property and small-scale production and reassembled human activity in the form of large-scale cooperation, an extensive division of labor, production based on conscious scientific knowledge — after all that,  it will be, he says, “infinitely less violent” to replace that with socialism than it was to break up all of those smaller structures earlier. Does Marx say that we’ll just look out the window one day and say, oh, hey, it’s socialism? No. But it’s not that far off.

Or similarly, you can find Keynes writing in the 1920s saying that the most striking fact about the world that he sees around him is the tendency of large enterprises to socialize themselves. Corporations, having been established to carry out some particular purpose, to produce some concrete use value, becomes oriented towards the production of that use value. They cease to be oriented towards producing profits for their shareholders. 

This is, in some sense, the same story that shareholder advocates like Michael Jensen told  in the 70s and 80s. Except that they saw it not as the march of history, but as a problem to be overcome. And this is the point that we come back to in our book. In practice, productive activity is overwhelmingly organized in non-market ways. But acknowledgment of this fact is profoundly threatening to elites, whose claim on society is expressed in terms of money.

This is the point. We don’t see how much of our life is already organized in non-market ways.  

We all of us in this room came here for non-market reasons. None of us was paid to be here. None of us came here because a market signal told us to. 

There are, obviously, payments that organize the operation of this building. But there is also an activity taking place in this room, in this building, that is not a market outcome, that is not organized through money payments, that doesn’t produce or respond to price changes. 

Education is an activity that is particularly resistant to organization through markets and money payments and the pursuit of profit. But it’s not unique. Many of us came here on the MTA, an institution that was set up originally according to the logic of markets and money payments. But that didn’t work for running a transit system. The MTA didn’t become public because of an ideological crusade to socialize it. It became public because it could not simultaneously fulfill its social function while still being operated profitably. So the state had to take it over. 

What we see around us is that the organization of production in practice calls for non-market forms — money does not perform the coordinating role that it purports to. But what we also see is that the structures of hierarchy and authority in our society very often justify themselves and legitimate themselves as if they were forms of market coordination. Money and property rights become badges of authority that are worn by the people who in fact issue commands through systems of hierarchy and personal domination. 

The great challenge that we face if we wish to transform this system is not that we need to find new ways of non-market coordination. It is to find ways of democratizing the forms of planning and hierarchy that exist. We do not have to ask, well, how do we organize production without markets? — because we already do. 

The great challenge is the enormous resources of violence in the hands of money owners,  and their willingness to see the existing organization of collective action wrecked rather than allowing it to socialize itself, no matter how strongly the actual needs of production point in that direction. 

The problem — the fundamental problem,  at this moment it feels clearer than ever — is how to overcome the enormous powers of coercion and violence in the hands of those whose status and authority is expressed through money. 

Sri Lanka’s Interest Rate Trap

This piece was coauthored with Arjun Jayadev and Ahilan Kardirgamar. It was first published in Project Syndicate, and republished in The Daily FT in Sri Lanka.

Sri Lanka is currently undergoing its worst economic crisis since Independence. The austerity measures imposed as a part of the ongoing IMF program – following the island nation’s first ever default on its external debt in 2022 – have led to poverty doubling to over 25 percent; according to the World Bank, poverty will not return to pre-crises levels until 2034. The economy is only just beginning to recover from a deep depression – in per capita terms, real GDP levels will not recover to 2018 levels until 2026, if then. A generation is being lost to malnutrition, school dropouts and youth unemployment. A country that a few decades ago was considered a model development state with enviable human development indicators is now being forced to dismantle its social welfare system. 

Yet in the midst of this crisis, Sri Lanka is living with one of the strangest paradoxes in global monetary policy: extraordinarily high interest rates in an economy grappling with deflation. For much of the last three years, the country has had some of the highest real interest rates in the world despite being in  a serious macroeconomic crisis, struggling with debt distress, and facing strong disinflationary forces. 

The Central Bank’s latest Monetary Policy Report (August 2025) acknowledged the depth of disinflation. Headline inflation fell below the target of 5 percent for three consecutive quarters, driven largely by energy and food prices.  Most recent data suggests that inflation moved from negative territory to slightly above zero (still well below its target). And yet, nominal rates are stuck at a punishing 8 percent.

By the conventional logic of monetary policy,  none of this makes sense. 

Economics textbooks describe monetary policy in terms of a “Taylor rule” linking the policy rate to the level of inflation and the output gap, or difference between actual output and an estimate of potential output. When output falls short of potential or inflation is below target, the central bank should choose a lower interest rate; when output is above potential or inflation is above target, the central bank should choose a higher rate. The hard cases are when these signals point in opposite directions.

Sri Lanka today is not a hard case.  Inflation well below target and a depressed real economy are both textbook signals to cut. And Sri Lanka’s inflation is not even trending upward. Meanwhile, the latest version of the Bank’s own monetary policy report shows Sri Lanka further below target now than a year ago. And since 2017, the share of the country’s population that is employed has fallen by a full four points, according to the World Bank – a sure sign of an economy operating below potential. And that is only the tip of the iceberg, where the informal sector accounting for more than sixty percent of the labour force is devastated without affordable credit for production. The choice to maintain current high interest rates under these conditions is impossible to square with any conventional understanding of monetary policy. 

Debt Dynamics and the Case for Cuts

Beyond the macro textbook case, there is a more pragmatic argument for lower rates: debt sustainability. The change in a government’s debt-GDP ratio does depend not just on current expenditure and revenue. It also depends on economic growth and interest on debt accumulated from the past. The larger the debt ratio currently is, the stronger the effect of those factors, relative to current budget choices.

With public debt close to 100 percent of GDP, debt sustainability in Sri Lanka is highly sensitive to interest costs. A few points difference on interest rates can shift the debt trajectory from a stable or falling debt ratio to one that is explosively growing.

The August 2025 report notes that credit to the private sector has expanded by 16 percent year-on-year despite deflation, but government borrowing costs remain elevated. Treasury bill yields, though down somewhat after the May rate cut, still hover at levels far above inflation. Maintaining real rates in the double digits in an economy with falling prices is not “prudence”—it is a form of fiscal self-harm-and a serious missed opportunity for helping a population that has been waterboarded by austerity over the past three years.

Countries in debt crises have long known that the denominator of debt to GDP ratios (nominal GDP) matters as much as the numerator. Consider the case of Greece in the years after the euro crisis. After years of rising debt, the Greek government was forced to turn to brutal austerity and cost-cutting, and managed to reduce its total debt by 15 billion euros – an amount equal to nearly 10 percent of GDP. Yet during this same period, the debt-GDP ratio actually rose by some 30 points, because Greek GDP fell so much faster. The Greek case is extreme, but the point is a general one: austerity in the name of fiscal sustainability can be self-defeating, if it destroys the conditions for economic growth. 

This is the risk that Sri Lanka is currently running.  High rates in a deflationary economy are the worst of both worlds: they raise interest payments while suppressing growth. By contrast, lower rates would both reduce financing costs directly and support growth.

Inflation Comes from Abroad, Not from Home

So what does the central bank think it is doing? The monetary policy report is striking in its near-exclusive focus on “price stability,” as if Sri Lanka were the United States or the Eurozone. Yet around 40 percent of Sri Lanka’s consumer basket is food, with a large additional share being energy. These prices depend more on global conditions and supply shocks than domestic demand. Raising or lowering policy rates will have little effect here. For a small open economy like Sri Lanka, inflation targeting in the textbook sense is often an imported delusion.

A more realistic goal for the central bank in a small open economy is external balance. Appropriate monetary policy can help stabilize the balance of payments, and avoid destabilizing swings in capital flows. But if the Bank’s true concern is the external sector, its public statements do a poor job communicating this. 

More importantly, the case for high rates looks equally questionable from this point of view. The central bank projects a current account surplus in 2025, meaning the country is accumulating rather than losing foreign exchange. This is a continuation of large positive balances in 2023 and 2024, thanks to strong remittances and rising tourism receipts. Gross official foreign exchange reserves climbed to over USD 6 billion in the first half of the year, despite debt service outflows. After a large devaluation in early 2022, the rupee has been stable recently, with no sign of reluctance by foreign investors to hold Sri Lankan assets.

In short: there is no evidence for an external financing crisis that could justify the Bank’s punishingly high domestic interest rates. To the contrary, the surplus liquidity in money markets reported by the Central Bank suggests that external conditions are ripe for further easing.

Misplaced Caution

The Monetary Policy Report cites “uncertainty around global demand” as a reason for caution. But this makes no sense: What matters for monetary policy is the level of rates, not the change in them. An interest rate of 8 percent is no less discouraging for investment just because rates were even higher a year ago.  The central bank is like a driver on an open highway who insists that they need to drive well below the speed limit now, because if there is bad traffic ahead, they will want to speed up. 

Sri Lanka’s monetary policy is clearly aimed less at economic conditions on the ground than at  pleasing external actors — the IMF, World Bank and its other creditors. The high interest rates and increasing foreign reserves signal a willingness to place the interest of foreign creditors ahead of the country’s own people and businesses. But if super-tight money triggers a renewed crisis and another default – as is possible – it won’t even end up helping the creditors. . 

A Policy for Recovery, Not Austerity

There is little evidence that high rates are serving their stated purpose of stabilizing inflation (missing on the downside is as bad as missing on the upside) or protecting the external balance. They are, however, choking domestic recovery and worsening the government’s already fragile finances.

It is not too late for a change in direction. After several years of flat or falling output, Sri Lanka’s economy grew 4.8 percent in the first quarter of 2025, with rebounds in industry and services.  To be sure, this is to some extent just a bounce back from the depressed conditions over the last few years. But it suggests that with appropriate policy, renewed growth is possible. Monetary restraint risks instead prolonging the crisis.

Conclusion

Sri Lanka needs a monetary policy for recovery, not austerity. With inflation below target, external accounts stable, and growth still tentative, holding rates at 8 percent is indefensible. The Central Bank should cut immediately,  while keeping an eye on capital flight – which, unlike inflation, is a genuine danger from cutting too fast. Doing so would not only support economic revival but also improve the country’s fiscal trajectory—helping Sri Lanka climb out of its debt trap, rather than prolonging it. 

History is clear: countries escape debt traps through growth, not through endless austerity. Sri Lanka cannot grow if credit is starved and government finances are bled by high interest bills. This is a critical moment to think about a pivot.

 

At Barron’s: The Cost of Living and the Cost of Money

(I write a monthlyish opinion piece for Barron’s. This one was published there in March 2025. My previous pieces are here.)

A lingering puzzle about inflation is why the public still seems so unhappy about it, even though it has, by conventional measures, returned to normal. 

One explanation is that people are simply confused, or misled by the media. But another possibility is that what people think of as the cost of living doesn’t match up with the way that economists measure inflation. Maybe people aren’t wrong or confused, they are just paying attention to something different.

Inflation means a rise in the cost of goods and services. But not all your bills are for goods and services. Things like interest payments are also costs. And last fall’s election followed three years of steeply rising interest rates. The average mortgage rate, for example, was over 7%, compared with less than 3% in 2021

That is the explanation for the mismatch between official statistics and public perceptions offered in a fascinating recent paper by former Treasury Secretary Lawrence Summers and several co-authors, titled “The Cost of Money is Part of the Cost of Living.” In one especially dramatic finding, they suggest that if we take interest into account, year-over-year inflation peaked to 18% in 2022, rather than the official 9%, and was still 8% at the end of 2023, when the official rate was 3.3%. 

I think the paper overstates its case. But it is still pointing to something real.

Conventional measures of inflation are supposed to reflect the prices of currently produced goods and services, but not asset purchases or financial transactions. But it isn’t always easy to know which payments are which. As a homeowner, you are buying both a place to live for the month, and an asset. In principle, the first should be counted in inflation, the second should not. But your single mortgage check includes both.

Today, the Bureau of Labor Statistics, which produces the country’s main inflation indicator, deals with this problem by imputing “owners equivalent rent.” In effect, we ask how much a homeowner would pay for their home, if they were renting it.

Before 1983, the BLS did things differently. Instead, it counted the full cost of home purchases, but only for houses bought in that period. Today’s measure estimates one month’s rent for all owner-occupied homes; the older method looks at the total cost of those homes purchased this month. Since houses are normally paid for with mortgages, that meant including interest payments that would be paid over many future years as part of this month’s price level. (To be exact, the BLS included future interest payments over half the length of the mortgage.)

Houses are a big part of consumption, so this difference isn’t a small detail. Summers and co-authors are absolutely right that when we compare inflation today to inflation in the 1970s, we aren’t comparing apples to apples. “Inflation” then meant something different than it does today. 

An earlier paper by three of the same economists looked at historic inflation using the modern definition. They concluded that, when we measure consistently, the late-1970s inflation was no higher than the inflation during the pandemic. 

The new article takes the opposite approach, and applies the pre-1983 definition to the recent inflation. This is a bit odd, given the strong and convincing criticism of the old methodology in the earlier article. Nonetheless, the results are striking. If people were experiencing inflation at double the official rate, no wonder they were upset!

In my opinion, the authors had it right the first time. There are good reasons the BLS abandoned its old approach. By including future interest payments on homes purchased in the current month, the old methodology greatly exaggerates the impact of interest rate changes. You can reasonably say that the mortgage payments you will make a decade from now are part of the price of your house, but they are not in any meaningful sense part of your cost of living today. 

That said, it does make sense that interest payments contribute to people’s experience of price increases. But how much? As a back of the envelope guess, we can observe that household interest payments grew from an annualized $600 billion in the last quarter of 2020 to over $1 trillion by the end of 2023. Those payments grew twice as fast as nominal consumer spending. If we add these interest payments to the cost of the consumption basket, then we find that the 2021-2022 increase in inflation was as much as two points greater, and inflation in 2024 remained about half a point higher than by conventional measures.

It seems to me that if you take seriously the idea that financing is part of the cost of goods and services, you can plausibly conclude that people were experiencing an inflation rate of 3% to 3.5% last fall, rather than the 2.5% to 3% percent reported by the BLS. That isn’t trivial. But I’m not sure it’s the sort of difference that elections turn on.

Still, Summers and his co-authors are pointing to something real and important. The cost of money is part of the cost of living. When the Federal Reserve aggressively raised rates over 2022-2023, it may – or may not! – have helped bring down inflation. But it definitely made it harder for families, and businesses, to service their debts. Monetary policymakers would do well to keep that second impact in mind in the future, along with the first. 

Democratizing Finance

(This is the text of a talk I gave for a workshop organized by the International Network for Democratic Economic Planning. The video of the conference is here.)

The starting point for this conversation, it seems to me, is that planning is everywhere in the economy we already live in.

There’s a widespread idea that production today is largely or entirely coordinated by markets. This idea  is ubiquitous in economics textbooks, of course; it also forms a major part of unspoken economic common sense, even for many socialists and others on the left politically. But it seems to me that when you look at things more critically, the role of market coordination in the economies that we live in is in fact rather limited.

Within the enterprise, markets are almost nonexistent. Production is organized through various forms of hierarchy and command, as well as through intrinsic motivation — what David Graeber calls everyday communism or what we might call the professional conscience — the desire to do one’s job well for its own sake.

The formation, growth and extinction of enterprises, meanwhile, is organized through finance. People sometimes talk about firms growing and dying through some kind of Darwinian process, but the function of finance is precisely to prevent that. By redistributing surplus between firms, finance breaks the link between the profits a firm earned yesterday and the funds available for it to invest today.

The whole elaborate structure of banks, stock markets, venture capital and so on exists precisely to make funds available for new firms, or firms that have not yet been profitable. We see this very clearly in Silicon Valley, as in the current boom in “AI” investment — this is as far as you can get from a world where growth is the result of past profits.

On the other side, institutions like private equity, and the market for corporate control, ensure that that the surplus generated in one firm need  not be reinvested there. It can be extracted — consensually or otherwise — and used somewhere else.

In both cases, this is not happening through any kind of automatic market logic, but through someone’s conscious choice.

Once we think of finance as a system of planning , it is natural to ask if it can be redirected to meet social needs, such as addressing climate change. I want to make four suggestions about how we can pursue this idea most effectively.

First. We need to think about where financing constraints matter, and where they don’t.

Many firms do fund investment largely from their own profits; in others, investment spending is modest relative to current costs. In both these cases — where investment is internally financed, and where investment requirements are low relative to costs of production — finance will have limited effects on real activity.

Where finance is most powerful is in new or rapidly growing, capital-intensive sectors, especially where firms are relatively small. Green energy is an important example — for wind or solar power, almost all the costs are upfront. Housing is also an area where finance is clearly important – while this is of course, a very old sector, firms are relatively small, capital costs are large, assets are very long-lived, and there is a significant lag between outlays and income. It is clear that booms and busts in housing construction have a great deal to do with credit conditions.

Labor intensive sectors like care work, on the other hand, are poor targets for credit policy, since costs and revenues occur more or less simultaneously, and capital needs are minimal. Subsidies or other “real” interventions are needed here.

Large, established firms are also likely to be fairly insensitive to credit policy. There’s a great deal of evidence that the internal discount rates corporations use to evaluate investment projects are not tightly linked to interest rates. At best, financing may relax an external constraint where decision makers already operate with long horizons. But what we know about corporate investment decisions suggests that they are not much affected by credit conditions — something that thoughtful central bankers have long understood.

Second. Channeling credit to constrained areas will have a bigger impact than penalizing credit to unwanted areas.

This seems like an important limitation on the types of green policies adopted by the ECB, for example. For firms that issue bonds, the interest rate they face is not likely to be a major factor in their investment decisions. Where credit matters most is for smaller, bank-dependent firms and households, which face hard limits on how much they can borrow.

This is even more the case for the stock market. Firms for which stock issuance is a significant form of financing make up a very, very small group. In general, changes in stock ownership will have no effect on real investment at all.

Related to this is the question of rules vs discretion. It is relatively easy to write rules for what not to invest in. Targeting finance-constrained sectors requires more strategic choices. So this is an instrument that is state-capacity intensive. In a setting of limited capacity, credit policy is unlikely to work well.

Similarly, if we want to see across-the-board changes, as opposed to fostering new growth in particular areas,  credit is not the right tool. In that case it is better to directly regulate the outcomes we are interested in. If you want higher wages, write a minimum wage law. Don’t tell your central bank to penalize holdings of shares in low-wage firms.

Third. We need to think carefully about what parts of finance we want to socialize, and where new institutions are needed and where they aren’t.

Various financial institutions offer funding to real activity (directly or indirectly) on their asset side, while issuing liabilities that some particular group of wealth owners wants to hold. In the case of many institutions — banks, insurance companies, pension funds — their social value comes as much or more from the distinctive liabilities they issue, as from the activities that they finance.

It’s natural to imagine public finance in similar terms, and think of a public investment authority, say, issuing distinctive liabilities that are somehow connected to the activities that it finances. I think we need to tread very cautiously here. The connections between the two sides of private balance sheets are largely irrelevant for the public sector.

The public sector already finances itself on the most favorable terms of any entity in the economy. The private sector’s need for retirement security and other forms of insurance can be addressed by the public sector directly. Public provision of new assets for retirement saving would be a step backward from current systems of public provision.

There is a case for a larger public role in the payments system, and in the direct provision of banking services to those who currently lack access to them. But there is no reason to link this service provision to public credit provision, and a number of good reasons not to.

The stronger arguments for socializing finance, it seems to me, lie on the asset side of the public-sector balance sheet. We don’t need to find new ways of financing things the public already does. We do need to bring public criteria into the financing of private activity.

It’s worth emphasizing that what matters is what gets financed, and on what terms. Who owns the assets has no importance in itself. Setting up a sovereign wealth fund does nothing to socialize investment, if the fund is operated on the same principles as a private fund would be.

I observed this first-hand some years ago, when I worked in the AFL-CIO’s Office of Investment. The idea was to use the substantial assets of union-affiliated pension funds to support labor in conflicts with employers. But in practice, the funds were so constrained both by legal restrictions and by the culture of professional asset management that it was effectively impossible to depart from the conventional framework of maximizing shareholder value.

Fourth. We need to link proposals for socializing finance to a critique of conventional monetary policy. We need to challenge the sharp lines between planning, prudential regulation, and monetary policy proper. In reality, every action taken by the central bank channels credit towards some activities, and away from others.

One important lesson of the past 15 years is the limits of conventional monetary policy as a tool for stabilizing aggregate demand. But central banks do have immense power over the prices of various financial assets, and monetary policy actions have outsized effects on credit-sensitive sectors of the economy. A program of using credit policy for what it can do — fostering the growth of particular new sectors and activities — goes hand in hand with not using credit policy for what it cannot do — stabilizing inflation and employment. In this sense, socializing finance and developing alternative tools for demand management are complementary programs. Or perhaps, they are the same program.

It’s worth noting that Keynes was very skeptical of the sort of fiscal policy that has come to be associated with his name. He did not believe in running large fiscal deficits, or boosting demand via payments to individuals. For him, stabilizing demand meant stabilizing investment spending. And this meant, above all, reorienting it way from future profitability, which is inherently unknowable, and beliefs about which are therefore ungrounded.

This is a key element in the Keynesian vision that is often overlooked: Our inability to know the future matters less when we are focused on providing concrete social goods. It may be very hard, even impossible, to know how much the apartments in a given building will rent for in thirty years, depending as it does on factors like the desirability of the neighborhood, how much housing is built elsewhere, and the overall state of the economy. But how long the building will stand up for, and how many people it can comfortably house, are questions we can answer with reasonable confidence.

Wouldn’t it be simpler, then, to stabilize private demand in the first place, rather than try to offset its fluctuations with changes in the interest rate or public budget position? From this point of view, our current apparatus of monetary policy would be rendered unnecessary by a program of reorienting investment to meet real human needs.

UPDATE: I have added a link to the video of the conference.

At The International Economy: Low Interest Rates Were OK

(I am an occasional contributor to roundtables of economists in the magazine The International Economy. This month’s roundtable was on concerns that ultra-low interest rates after the 2007-2009 financial crisis contributed to rising inequality and asset bubbles, and asked contributors to grade post-2007 monetary policy on a scale of A to F.)

Overall, I give the negative interest rate experiment a grade of B. The costs of negative rates have been greatly exaggerated. But so have the benefits. The main lesson is that conventional monetary policy is surprisingly weak in a depressed economy, even when carried to extremes. The next time we need stimulus, greater weight should be put on fiscal policy.

The case against ultra-low rates on distribution grounds is not very strong, in my view. Yes, low rates do tend to raise asset values,  and it’s the rich who own most of the assets. But we should not make the mistake so many people do, and confuse a change in the present value of future income streams with a change in those streams themselves. Low rates, for example, imply a greater present value of the same future dividend payments, and thus higher stock prices. But that has no effect on income distribution — the owners of the stock are receiving the same payments as they were before.

The bigger criticism of ultra-low rates is that they didn’t have much effect one way or another. Did 20 years of zero nominal rates in Japan significantly boost demand and growth? It doesn’t seem like it.

At the same time, we should be careful of language like “distortion,” which suggests that there is some true, natural level of interest rates and investment. Whether high or low, interest rates are always set by policy. And this always involves tradeoffs between competing social goals.

Whether ultra-low rates contribute to bubbles is debatable. Many of the world’s great bubbles — from the 1920s in the US to the 1990s in Sweden — have occurred in environments of high interest rates. But let’s say for the sake of argument that cryptocurrency is socially useless, and that it would never have taken off if rates were higher. Is this a problem with negative rates? Or is it a problem with the financial system? The reason we have so many well-educated, well-compensated people working in finance is that they are supposed to direct credit to the best opportunities. If cheap money leads them to invest in projects that are worthless, or worse, rather than ones with moderate returns, they’re not doing their jobs.

If jet fuel were free, we would all probably fly more. But if planes kept crashing into the ocean, we’d blame the airlines, not the cheap fuel.

Speaking of airlines, it’s easy in retrospect to see the subsidized loans to them and other pandemic-hit industries as excessive. But we don’t know what the counterfactual is — it’s possible that without public support, they would have collapsed into bankruptcy, leading to a much slower recovery. Certainly we couldn’t be sure at the time. Under the extraordinary circumstances of the pandemic, there was no safe course, only a balance of risks. The high inflation of 2021-2022 was unfortunate; a prolonged depression would have been much worse. Perhaps next time — and climate change ensures that there will be a next time — we will strike a better balance. But it seems to me that under the circumstances, policymakers did pretty well.

*

That’s what I wrote for the symposium. Let me add a couple of things here.

First, this is not a new debate. Many of the same arguments were being made immediately after the global financial crisis, and even before it in the mid-2000s, in the context of the supposed global savings glut. At that time, the idea was that the volume of excess savings in Asia were too great to be absorbed by productive investment in the US and elsewhere, leading to downward pressure on interest rates and an excess of speculative investment, in housing especially.

It’s progress, I suppose, that the more recent period of low interest rates is attributed straightforwardly to central banks, as opposed to an imagined excess of “saving.” (For a critique of the savings-glut story, you can’t do better than Jörg Bibow’s excellent work.) But the more fundamental problem remains that the savings-glut/too-low-for-too-long stories never explain how they coexist with all the other economic stories in which more abundant financing is unambigously a good thing. As I wrote a dozen years ago3:

the savings glut hypothesis fails to answer two central, related questions: Why was there a lack of productive investments available to be financed, and why did the financial system fail to channel the inflow of savings in a sustainable way? From a Keynesian perspective, there is nothing strange about the idea of a world where savings rates are chronically too high, so that output is demand-constrained; but this is not the perspective from which the savings-glut hypothesisers are arguing. In other contexts, they take it for granted that an increase in the savings rate will result in greater investment and faster growth.

In particular, as I pointed out there, many of the same people arguing for these stories also think that it is very desirable to reduce government budget deficits. But if you ask any economist what is the economic benefit of moving the government balance toward surplus, their answer will be that it frees up saving for the private sector; that is, lower interest rates.4

Second. Returning to the International Economy roundtable, it’s striking how many of the contributors shared my basic analysis5 —  ultra-low rates didn’t achieve very much, but they were better than nothing given the failure of the budget authorities to undertake adequate stimulus. It’s interesting is that people with this same analysis — and who also reject the idea that the low rates of the 2010s are to blame for the inflation of the early 2020s — give such different responses on the grading component. I agree with everything that Jamie Galbraith writes, and especially appreciate his points that hardly any private borrowers ever faced zero (let alone negative) rates, and that higher rates do not seem to have done much to curb speculative excess. (Just look at “AI”.) I also agree with everything Heiner Flassbeck says (especially the underappreciated point that we’ve also had a decisive test of the benefits of wage flexibility, with negative results) and with almost everything Brigitte Granville says. Yet two of us give As and Bs, and two give Ds and Fs. It’s the difference between comparing monetary policy’s actual performance to what it reasonably could have accomplished, and to what it promised, perhaps.

Finally. It might seem strange to see me speaking so positively about macroeconomic policy over the past decade. Aren’t I supposed to be a radical of some sort?6 It was even a bit disconcerting to me to see I typed those words a few months ago (there’s a bit of turnaround time with these things), given that my main feelings about Western governments these days tend toward rage and disgust.

But the point here is important. It’s important to remember that the central macroeconomic problem in recent years has been insufficient demand.7 It’s important to remind people of the overwhelming evidence, and the quite broad consensus, that the economic problem over the past 15 years has not been a lack of real resources, but a lack of spending — of demand. (A world in which over-low interest rates could even be a concern, is not a world where the central economic problem is scarcity.) And I think that it’s true, and important, that the institutions — at least in the US and Western Europe — that were consistently trying to address this problem, were the central banks.

Even today, while we can certainly argue that central banks raised rates too aggressively, the main contractionary pressure is coming from elected governments. This is most obvious in Europe, but in the US, it seems to me, the withdrawal of pandemic unemployment benefits and the child tax credit have done more harm than anything the Fed has done. There’s an old idea that elected governments are structurally biased toward deficits and generous social benefits.8 But it’s clear this is no longer true, if it ever was.

Against this background, I think both the broader recognition of hysteresis and chronic demand shortfalls in the 2010s, and the aggressive response to the pandemic in this decade, are positive lessons that need to be preserved and defended and built upon. It’s very challenging to separate this positive record on domestic economic policy from the increasingly horrifying treatment of the rest of the world that we have seen from the same governments. (I make this argument in the context of industrial policy in a forthcoming piece in Dissent.) But I think it’s vitally important, both politically and analytically, that we continue to try to do so.

 

Taking Money Seriously

(Text of a talk I delivered at the Watson Institute for International and Public Affairs at Brown University on June 17, 2024.)

There is an odd dual quality to the world around us.

Consider a building. It has one, two or many stories; it’s made of wood, brick or steel; heated with oil or gas; with doors, windows and so on. If you could disassemble the building you could make a precise quantitative description of it — so many bricks, so much length of wire and pipe, so many tiles and panes of glass.

A building also has a second set of characteristics, that are not visible to the senses. Every building has an owner, who has more or less exclusive rights to the use of it. It has a price, reflected in some past or prospective sale and recorded on a balance sheet. It generates a stream of money payments. To the owner from tenants to whom the owner delegated som of their rights. From the owner to mortgage lenders and tax authorities, and to the people whose labor keeps them operating — or to the businesses that command that labor. Like the bricks in the building’s walls or the water flowing through its pipes, these can be expressed as numbers. But unlike those physical quantities, all of these can be expressed in the same way, as dollars or other units of currency.

What is the relationship between these two sets of characteristics? Do the prices and payments simply describe the or reflect the physical qualities? Or do they have their own independent existence? 

My starting point is that this is a problem — that the answer is not obvious.

The relationship between money-world and the concrete social and material world is long-standing, though not always explicit, question in the history of economic thought. A central strand in that history is the search for an answer that unifies these two worlds into one. 

From the beginnings of economics down to today’s textbooks, you can find variations on the argument that money quantities and money payments are just shorthand for the characteristics and use of concrete material objects. They are neutral — mere descriptions, which can’t change the underlying things. 

In 1752, we find David Hume writing that “Money is nothing but the representation of labour and commodities… Where coin is in greater plenty; as a greater quantity of it is required to represent the same quantity of goods; it can have no effect, either good or bad.”

And at the turn of the 21st century, we hear the same thing from FOMC member Lawrence Meyer: “Monetary policy cannot influence real variables–such as output and employment.” Money, he says, only affects “inflation in the long run. This immediately makes price stability … the direct, unequivocal, and singular long-term objective of monetary policy.”

We could add endless examples in between.

This view profoundly shapes most of our thinking about the economy.

We’ve all heard that money is neutral — that changes in the supply or availability of money only affect the price level while leaving relative prices and real activity unchanged. We’ve probably encountered the Coase Theorem, which says that the way goods are allocated to meet real human needs should be independent of who holds the associated property rights. We are used to talking about “real” output and “real “ interest rates without worrying too much about what they refer to.

There is, of course, also a long history of arguments on the other side — that money is autonomous, that money and credit are active forces shaping the concrete world of production and exchange, that there is no underlying value to which money-prices refer. But for the most part, these counter-perspectives occupy marginal or subterranean positions in economic theory, though they may have been influential in other domains.

The great exception is, of course, Keynes. Indeed, there is an argument that what was revolutionary about the Keynesian revolution was his break with orthodoxy on precisely this point. In the period leading up to the General Theory, he explained that the difference between the economic orthodoxy and the new theory he was seeking to develop was fundamentally the difference between the dominant vision of the economy in terms of what he called “real exchange,” and an alternative he vision he described as “monetary production.”

The orthodox theory (in our day as well as his) started from an economy in which commodities exchanged for other commodities, and then brought money in at a later stage, if at all, without changing the fundamental material tradeoffs on which exchange was based. His theory, by contrast, would describe an economy in which money is not neutral, and in which the organization of production cannot be understood in nonmonetary terms. Or in his words, it is the theory of “an economy in which money plays a part of its own and affects motives and decisions and is … so that the course of events cannot predicted, either in the long period or in the short, without a knowledge of the behavior of money.”

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If you are fortunate enough to have been educated in the Keynesian tradition, then it’s easy enough to reject the idea that money is neutral. But figuring out how money world and concrete social reality do connect — that is not so straightforward. 

I’m currently in the final stages of writing a book with Arjun Jayadev, Money and Things, that is about exactly this question — the interface of money world with the social and material world outside of it. 

Starting from Keynes monetary-production vision, we explore question of how money matters in four settings.

First, the determination of the interest rate. There is, we argue, a basic incompatibility between a theory of the interest rate as price of saving or of time, and of the monetary interest rate we observe in the real world. And once we take seriously the idea of interest as the price of liquidity, we see why money cannot be neutral — why financial conditions invariably influence the composition as well as the level of expenditure. 

Second, price indexes and “real” quantities.  The ubiquitous  “real” quantities constructed by economists are, we suggest, at best phantom images of monetary quantities. Human productive activity is not in itself describable in terms of aggregate quantities. Obviously particular physical quantities, like the materials in this building, do exist. But there is no way to make a quantitative comparison between these heterogeneous things except on the basis of money prices — prices are not measuring any preexisting value. Prices within an exchange community are objective, from the point of view of those within the community. But there is no logically consistent procedure for comparing “real” output once you leave boundaries of a given exchange community, whether across time or between countries

The third area we look at the interface of money world and social reality is corporate finance and governance. We see the corporation as a central site of tension between the distinct social logics of money and production. Corporations are the central institutions of monetary production, but they are not themselves organized on market principles. In effect, the pursuit of profit pushes wealth owners to accept a temporary suspension of the logic of market – but this can only be carried so far.

The fourth area is debt and capital. These two central aggregates of money-world are generally understood to reflect “real,” nonmonetary facts about the world — a mass of means of production in the case of capital, cumulated spending relative to income in the case of debt. But the actual historical evolution of these aggregates cannot, we show, be understood in this way in either case. The evolution of capital as we observe it, in the form of wealth, is driven by changes in the value of existing claims on production, rather than the accumulation of new capital goods. These valuation changes in turn reflect, first, social factors influencing division of income between workers and owners and, second, financial factors influencing valuations of future income streams. Debt is indeed related to borrowing, in a way that capital is not related to accumulation. But changes in indebtedness over time owe as much to interest, income and price-level changes that affect burden of existing debt stock as they do to new borrowing. And in any case borrowing mainly finances asset ownership, as opposed to the dissaving that the real-excahnge vision imagines it as.

Even with the generous time allotted to me, I can’t discuss all four of those areas. So in this talk I will focus on the interest rate.

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Some of what I am going to say here may seem familiar, or obvious. 

But I think it’s important to start here because it is so central to debates about money and macroeconomics. Axel Leijonhufvud long ago argued that the theory of the interest rate was at the heart of the confusion in modern macroeconomics. “The inconclusive quarrels … that drag on because the contending parties cannot agree what the issue is, largely stem from this source.” I think this is still largely true. 

Orthodoxy thinks of the interest rate as the price of savings, or loanable funds, or alternatively, as the tradeoff between consumption in the future and consumption in the present.

Interest in this sense is a fundamentally non-monetary concept. It is a price of two commodities, based on the same balance of scarcity and human needs that are the basis of other prices. The tradeoff between a shirt today and a shirt next year, expressed in the interest rate, is no different between the tradeoff between a cotton shirt and a linen one, or one with short versus long sleeves. The commodities just happen to be distinguished by time, rather than some other quality. 

Monetary loans, in this view, are just like a loan of a tangible object. I have a some sugar, let’s say. My neighbor knocks on the door, and asks to borrow it. If I lend it to them, I give up the use of it today. Tomorrow, the neighbor will return the same amount of sugar to me, plus something  extra – perhaps one of the cookies they baked with it. Whatever income you receive from ownership of an asset — whether we call it interest, profit or cookies — is a reward for deferring your use of the concrete services that the asset provides.

This way of thinking about interest is ubiquitous in economics. In the early 19th century Nassau Senior described interest as the reward for abstinence, which gives it a nice air of Protestant morality. In a current textbook, in this case Gregory Mankiw’s, you can find the same idea expressed in more neutral language: “Saving and investment can be interpreted in terms of supply and demand … of loanable funds — households lend their savings to investors or deposit their savings in a bank that then loans the funds out.”

It’s a little ambiguous exactly how we are supposed to imagine these funds, but clearly they are something that already exists before the bank comes into the picture. Just as with the sugar, if their owner is not currently using them, they can lend them to someone else, and get a reward for doing so.

If you’ve studied macroeconomics at the graduate level, you probably spent much of the semester thinking about variations on this story of tradeoffs between stuff today and stuff in the future, in the form of an Euler equation equating marginal costs and benefits across time. It’s not much of an exaggeration to say that mathematically elaborated versions of this story are the contemporary macro curriculum.

Money and finance don’t come into this story. As Mankiw says, investors can borrow from the public directly or indirectly via banks – the economic logic is the same either way. 

We might challenge this story from a couple of directions.

One criticism — first made by Piero Sraffa, in a famous debate with Friedrich Hayek about 100 years ago — is that in a non monetary world each commodity will have its own distinct rate of interest. Let’s say a pound of flour trades for 1.1 pounds (or kilograms) of flour a year from now. What will a pound or kilo of sugar today trade for? If, over the intervening year, the price of sugar rises relative to the price of flour, then a given quantity of sugar today will trade for a smaller amount of sugar a year from now, than the same quantity of flour will. Unless the relative price of flour and sugar are fixed, their interest rates will be different. Flour today will trade at one rate for flour in the future, sugar at a different rate; the use of a car or a house, a kilowatt of electricity, and so on will each trade with the same thing in the future at their own rates, reflecting actual and expected conditions in the markets for each of these commodities. There’s no way to say that any one of these myriad own-rates is “the” rate of interest.

Careful discussions of the natural rate of interest will acknowledge that it is only defined under the assumption that relative prices never change.

Another problem is that the savings story assumes that the thing to be loaned — whether it is a specific commodity or generic funds — already exists. But in the monetary economy we live in, production is carried out for sale. Things that are not purchased, will not be produced. When you decide not to consume something, you don’t make that thing available for someone else. Rather, you reduce the output of it, and the income of the producers of it, by the same amount as you reduce your own consumption. 

Saving, remember, is the difference between income and consumption. For you as an individual, you can take my  income as given when deciding how much to consume. So consuming less means saving more. But at the level of the economy as a whole, income is not independent of consumption. A decision to consume less does not raise aggregate saving, it lowers aggregate income. This is the fallacy of consumption emphasized by Keynes: individual decisions about consumption and saving have no effect on aggregate saving.

So the question of how the interest rate is determined, is linked directly to the idea of demand constraints.

Alternatively, rather than criticizing the loanable-funds story, we can start from the other direction, from the monetary world we actually live in. Then we’ll see that credit transactions don’t involve the sort of tradeoff between present and future that orthodoxy focuses on. 

Let’s say you are buying a home.

On the day that you settle , you visit the bank to finalize your mortgage. The bank manager puts in two ledger entries: One is a credit to your account, and a liability to the bank, which we call the deposit. The other, equal and offsetting entry is a credit to the bank’s own account, and a liability for you. This is what we call the loan. The first is an IOU from the bank to you, payable at any time.  The second is an IOU from you to the bank,  with specified payments every month, typically, in the US, for the next 30 years. Like ordinary IOUs, these ledger entries are created simply by recording them — in earlier times it was called “fountain pen” money.

The deposit is then immediately transferred to the seller, in return for the title to the house. For the bank, this simply means changing the name on the deposit — in effect,  you communicate to the bank that their debt that was payable to you, is now payable to the seller. On your balance sheet, one asset has been swapped for another — the $250,000 deposit, in this case, for a house worth $250,000.  The seller makes the opposite swap, of the title to a house for an equal value IOU from the bank.

As we can see, there is no saving or dissaving here. Everyone has just swapped assets of equal value.

This mortgage is not a loan of preexisting funds or of anything else. No one had to first make a deposit at the bank in order to allow them to make this loan.  The deposit — the money — was created in the process of making the loan itself. Banking does not channel saving to borrowing as in the loanable-funds view, but allows a swap of promises.

One thing I always emphasize to my students: You should not talk about putting money in the bank. The bank’s record is the money.

On one level this is common knowledge. I am sure almost everyone in this room could explain how banks create money. But the larger implications are seldom thought through. 

What did this transaction consist of? A set of promises. The bank made a promise to the borrowers, and the borrowers made a promise to the bank. And then the bank’s promise was transferred to the sellers, who can transfer it to some third party in turn. 

The reason that the bank is needed here is because you cannot directly make a promise to the seller. 

You are willing to make a promise of future payments whose present value is worth more than the value the seller puts on their house. Accepting that deal will make both sides better off. But you can’t close that deal, because your promise of payments over the next 30 years is not credible. They don’t know if you are good for it. They don’t have the ability to enforce it. And even they trust you, maybe because you’re related or have some other relationship, other people do not. So the seller can’t turn your promise of payment into an immediate claim on other things they might want. 

Orthodox theory starts from assumption that everyone can freely contract over income and commodities at any date in the future. That familiar Euler equation is based on the idea that you can allocate your income from any future period to consumption in the present, or vice versa. That is the framework within which the interest rate looks like a tradeoff between present and future. But you can’t understand interest in a framework that abstracts away from precisely the function that money and credit play in real economies.

The fundamental role of a bank, as Hyman Minsky emphasized,  is not intermediation but acceptance. Banks function as third parties who broaden the range of transactions that can take place on the basis of promises. You are willing to commit to a flow of money payments to gain legal rights to the house. But that is not enough to acquire the house. The bank, on the other hand, precisely because its own promises are widely trusted, is in a position to accept a promise from you.

Interest is not paid because consumption today is more desirable than consumption in the future. Interest is paid because credible promises about the future are hard to make. 

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The cost of the mortgage loan is not that anyone had to postpone their spending. The cost is that the balance sheets of both transactors have become less liquid.

We can think of liquidity in terms of flexibility — an asset or a balance sheet position is liquid insofar as it broadens your range of options. Less liquidity, means fewer options.

For you as a homebuyer, the result of the transaction is that you have committed yourself to a set of fixed money payments over the next 30 years, and acquired the legal rights associated with ownership of a home. These rights are presumably worth more to you than the rental housing you could acquire with a similar flow of money payments. But title to the house cannot easily be turned back into money and thereby to claims on other parts of the social product. Home ownership involves — for better or worse — a long-term commitment to live in a particular place.  The tradeoff the homebuyer makes by borrowing is not more consumption today in exchange for less consumption tomorrow. It is a higher level of consumption today and tomorrow, in exchange for reduced flexibility in their budget and where they will live. Both the commitment to make the mortgage payments and the non-fungibility of home ownership leave less leeway to adapt to unexpected future developments.

On the other side, the bank has added a deposit liability, which requires payment at any time, and a mortgage asset which in itself promises payment only on a fixed schedule in the future. This likewise reduces the bank’s freedom of maneuver. They are exposed not only to the risk that the borrower will not make payments, but also to the risk of capital loss if interest rates rise during the period they hold the mortgage, and to the risk that the mortgage will not be saleable in an emergency, or only at an unexpectedly low price. As real world examples like, recently, Silicon Valley Bank show, these latter risks may in practice be much more serious than the default risk. The cost to the bank making the loan is that its balance sheet becomes more fragile.

Or as Keynes put it in a 1937 article, “The interest rate … can be regarded as being determined by the interplay of the terms on which the public desires to become more or less liquid and those on which the banking system is ready to become more or less unliquid.”

Of course in the real world things are more complicated. The bank does not need to wait for the mortgage payments to be made at the scheduled time. It can transfer the mortgage to a third party,  trading off some of the income it expected for a more liquid position. The buyer might be some other financial institution looking for a position farther toward the income end of the liquidity-income tradeoff, perhaps with multiple layers of balance sheets in between. Or the buyer might be the professional liquidity-providers at the central bank. 

Incidentally, this is an answer to a question that people don’t ask often enough: How is it that the central bank is able to set the interest rate at all? The central bank plays no part in the market for loanable funds. But central banks are very much in the liquidity business. 

It is monetary policy, after all, not savings policy.  

One thing this points to is that there is no fundamental difference between routine monetary policy and the central bank’s role as a lender of last resort and a regulator. All of these activities are about managing the level of liquidity within the financial system. How easy is it to meet your obligations. Too hard, and the web of obligations breaks. Too easy, and the web of money obligations loses its ability to shape our activity, and no longer serves as an effective coordination device. 

As the price of money — the price for flexibility in making payments as opposed to fixed commitments — the interest rate is a central parameter of any monetary economy. The metaphor of “tight” or “loose” conditions for high or low interest rates captures an important truth about the connection between interest and the flexibility or rigidity of the financial system. High interest rates correspond to a situation in which promises of future payment are worth less in terms of command over resources today. When it’s harder to gain control over real resources with promises of future payment, the pattern of today’s payments is more tightly linked to yesterday’s income. Conversely, low interest rates mean that a promise of future payments goes a long way in securing resources today. That means that claims on real resources therefore depend less on incomes in the past, and more on beliefs about the future. And because interest rate changes always come in an environment of preexisting money commitments, interest also acts as a scaling variable, reweighting the claims of creditors against the income of debtors.

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In addition to credit transactions, the other setting in which interest appears in the real world is in the  price of existing assets. 

A promise of money payments in the future becomes an object in its own right, distinct from those payments themselves. I started out by saying that all sorts of tangible objects have a shadowy double in money-world. But a flow of money payments can also acquire a phantom double.  A promise of future payment creates a new property right, with its owner and market price. 

When we focus on that fact, we see an important role for convention in the determination of interest. To some important extent, bond prices – and therefore interest rates – are what they are, because that is what market participants expect them to be. 

A corporate bond promises a set of future payments. It’s easy in a theoretical world of certainty, to talk as if the bond just is those future payments. But it is not. 

This is not just because it might default, which is easy to incorporate into the model. It’s not just because any real bond was issued in a certain jurisdiction, and conveys rights and obligations beyond payment of interest — though these other characteristics always exist and can sometimes be important. It’s because the bond can be traded, and has a price which can change independent of the stream of future payments. 

If interest rates fall, your bond’s price will rise — and that possibility itself is a factor in the price of the bond.

This helps explain a widely acknowledged anomaly in financial markets. The expectation hypothesis says that the interest rate on a longer bond should be the same as the average of shorter rates over the same period, or at least that they should be related by a stable term premium. This seems like a straightforward arbitrage, but it fails completely, even in its weaker form.

The answer to this puzzle is an important part of Keynes’ argument in The General Theory. Market participants are not just interested in the two payment streams. They are interested in the price of the long bond itself.

Remember, the price of an asset always moves inversely with its yield. When rates on a given type of credit instrument go up, the price of that instrument falls. Now let’s say it’s widely believed that a 10 year bond is unlikely to trade below 2 percent for very long. Then you would be foolish to buy it at a yield much below 2 percent, because you are going to face a capital loss when yields return to their normal level. And if most people believe this, then the yield never will fall below 2 percent, no matter what happens with short rates.

In a real world where the future is uncertain and monetary commitments have their own independent existence, there is an important sense in which interest rates, especially longer ones, are what they are because that’s what people expect them to be.

One important implication of this is that we cannot think of various market interest rates as simply “the” interest rate, plus a risk premium. Different interest rates can move independently for reasons that have nothing to do with credit risk. 

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On the one hand, we have a body of theory built up on the idea of “the” interest rate as a tradeoff between present and future consumption. On the other, we have actual interest rates, set in the financial system in quite different ways.

People sometimes try to square the circle with the idea of a natural rate. Yes, they say, we know about liquidity and the term premium and the importance of different kinds of financial intermediaries and regulation and so on. But we still want to use the intertemporal model we were taught in graduate school. We reconcile this by treating the model as an analysis of what the interest rate ought to be. Yes, banks set interest rates in all kinds of ways, but there is only one interest rate consistent with stable prices and, more broadly, appropriate use of society’s resources. We call this the natural rate.

This idea was first formulated around the turn of the 20th century by Swedish economist Knut Wicksell. But the most influential modern statement comes from Milton Friedman. He introduces the natural rate of interest, along with its close cousin the natural rate of unemployment, in his 1968 Presidential Address to the American Economics Association, which has been described as the most influential paper in economics since World War II. The natural rates there correspond to the rates that would be “ground out by the Walrasian system of general equilibrium equations, provided there is imbedded in them the actual structural characteristics of the labor and commodity markets, including market imperfections, stochastic variability in demands and supplies, the cost of gathering information … and so on.” 

The appeal of the concept is clear: It provides a bridge between the nonmonetary world of intertemporal exchange of economic theory, and the monetary world of credit contracts in which we actually live. In so doing, it turns the intertemporal story from a descriptive one to a prescriptive one — from an account of how interest rates are determined, to a story about how central banks should conduct monetary policy.

Fed Chair Jerome Powell gave a nice example of how central bankers think of the natural rate in a speech a few years ago. He  introduces the natural interest rate R* with the statement that “In conventional models of the economy, major economic quantities … fluctuate around values that are considered ‘normal,’ or ‘natural,’ or ‘desired.’” R* reflects “views on the longer-run normal values for … the federal funds rate” which are based on “ fundamental structural features of the economy.” 

Notice the confusion here between the terms normal, natural and desired, three words with quite different meanings. R* is apparently supposed to be the long-term average interest rate, and the interest rate that we would see in a world governed only fundamentals and the interest rate that delvers the best policy outcomes.

This conflation is a ubiquitous and essential feature of discussions of natural rate. Like the controlled slipping between the two disks of a clutch in a car, it allows systems moving in quite different ways to be joined up without either side fracturing from the stress. The ambiguity between these distinct meanings is itself normal, natural and desired. 

The ECB gives perhaps an even nicer statement:  “At its most basic level, the interest rate is the ‘price of time’ — the remuneration for postponing spending into the future.” R* corresponds to this. It is a rate of interest determined by purely non monetary factors, which should be unaffected by developments in the financial system. Unfortunately, the actual interest rate may depart from this. In that case, the natural rate, says the ECB,  “while unobservable … provides a useful guidepost for monetary policy.”

I love the idea of an unobservable guidepost. It perfectly distills the contradiction embodied in the idea of R*. 

As a description of what the interest rate is, a loanable-funds model is merely wrong. But when it’s turned into a model of the natural rate, it isn’t even wrong. It has no content at all. There is no way to connect any of the terms in the model with any observable fact in the world. 

Go back to Friedman’s formulation, and you’ll see the problem: We don’t possess a model that embeds all the “actual structural characteristics” of the economy. For an economy whose structures evolve in historical time, it doesn’t make sense to even imagine such a thing. 

In practice, the short-run natural rate is defined as the one that results in inflation being at target — which is to say, whatever interest rate the central bank prefers.

The long-run natural rate is commonly defined as the real interest rate where “all markets are in equilibrium and there is therefore no pressure for any resources to be redistributed or growth rates for any variables to change.” In this hypothetical steady state, the interest rate depends only on the same structural features that are supposed to determine long-term growth — the rate of technical progress, population growth, and households’ willingness to defer consumption.

But there is no way to get from the short run to the long run. The real world is never in a situation where all markets are in equilibrium. Yes, we can sometimes identify long-run trends. But there is no reason to think that the only variables that matter for those trends are the ones we have chosen to focus on in a particular class of models. All those “actual structural characteristics” continue to exist in the long run.

The most we can say is this: As long as there is some reasonably consistent relationship between the policy interest rate set by the central bank and inflation, or whatever its target is, then there will be some level of the policy rate that gets you to the target. But there’s no way to identify that with “the interest rate” of a theoretical model. The current level of aggregate spending in the economy depends on all sorts of contingent, institutional factors, on sentiment, on choices made in the past, on the whole range of government policies. If you ask, what policy interest rate is most likely to move inflation toward 2 percent, all that stuff matters just as much as the supposed fundamentals.

The best you can do is set the policy rate by whatever rule of thumb or process you prefer, and then after the fact say that there must be some model where that would be the optimal choice. 

Michael Woodford is the author of Interest and Prices, one of the most influential efforts to incorporate monetary policy into a modern macroeconomic model. He pretty explicitly acknowledges that’s what he was doing — trying to backfill a theory to explain the choices that central banks were already making.

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What are the implications of this?

First, with regard to monetary policy, let’s acknowledge that it involves political choices made to achieve a variety of often conflicting social goals. As Ben Braun and others have written about very insightfully. 

Second, recognizing that interest is the price of liquidity, set in financial markets, is important for how we think about sovereign debt.

There’s a widespread story about fiscal crises that goes something like this. First, a government’s fiscal balance (surplus or deficit) over time determines its debt-GDP ratio. If a country has a high debt to GDP, that’s the result of overspending relative to tax revenues. Second, the debt ratio determines to market confidence; private investors do not want to buy the debt of a country that has already issued too much. Third, the state of market confidence determines the interest rate the government faces, or whether it can borrow at all. Fourth, there is a clear line where high debt and high interest rates make debt unsustainable; austerity is the unavoidable requirement once that line is passed. And finally, when austerity restores debt sustainability, that will contribute to economic growth. 

Alberto Alesina was among the most vigorous promoters of this story, but it’s a very common one.

If you accept the premises, the conclusions follow logically. Even better, they offer the satisfying spectacle of public-sector hubris meeting its nemesis. But when we look at debt as a monetary phenomenon, we see that its dynamics don’t run along such well-oiled tracks.

First of all, as a historical matter, differences in growth, inflation and interest rates are at least as important as the fiscal position in determining the evolution of the debt ratio over time. Where debt is already high, moderately slower growth or higher interest rates can easily raise the debt ratio faster than even very large surpluses can reduce it – as many countries subject to austerity have discovered. Conversely, rapid economic growth and low interest rates can lead to very large reductions in the debt ratio without the government ever running surpluses, as in the US and UK after World War II. More recently, Ireland reduced its debt-GDP ratio by 20 points in just five years in the mid-1990s while continuing to run substantial deficits, thanks to very fast growth of the “Celtic tiger” period. 

At the second step, market demand for government debt clearly is not an “objective” assessment of the fiscal position, but reflects broader liquidity conditions and the self-confirming conventional expectations of speculative markets. The claim that interest rates reflect the soundness or otherwise of public budgets runs up against a glaring problem: The financial markets that recoil from a country’s bonds one day were usually buying them eagerly the day before. The same markets that sent interest rates on Spanish, Portuguese and Greek bonds soaring in 2010 were the ones snapping up their public and private debt at rock-bottom rates in the mid-2000s. And they’re the same markets that returned to buying those countries debt at historically low levels today, even as their debt ratios, in many cases, remained very high. 

People like Alesina got hopelessly tangled up on this point. They wanted to insist both that post-crisis interest rates reflected an objective assessment of the state of public finances, and that the low rates before the crisis were the result of a speculative bubble. But you can’t have it both ways.

This is not to say that financial markets are never a constraint on government budgets. For most of the world, which doesn’t enjoy the backstop of a Fed or ECB, they very much are. But we should never imagine that financial conditions are an objective reflection of a country’s fiscal position, or of the balance of savings and investment. 

The third big takeaway, maybe the biggest one, is that money is never neutral.

If the interest rate is a price, what it is a price of is not “saving” or the willingness to wait. It is not “remuneration for deferring spending,” as the ECB has it. Rather, it is of the capacity to make and accept promises. And where this capacity really matters, is where finance is used not just to rearrange claims on existing assets and resources, but to organize the creation of new ones. The technical advantages of long lived means of production and specialized organizations can only be realized if people are in a position to make long-term commitments. And in a world where production is organized mainly through money payments, that in turn depends on the degree of liquidity.

There are, at any moment, an endless number of ways some part of society’s resources could be reorganized so as to generate greater incomes, and hopefully use values. You could open a restaurant, or build a house, or get a degree, or write a computer program, or put on a play. The physical resources for these activities are not scarce; the present value of the income they can generate exceeds their costs at any reasonable discount rate. What is scarce is trust. You, starting on a project, must exercise a claim on society’s resources now; society must accept your promise of benefits later. The hierarchy of money  allows participants in various collective projects to substitute trust in a third party for trust in each other. But trust is still the scarce resource.

Within the economy, some activities are more trust-intensive, or liquidity-constrained,  than others.

Liquidity is more of a problem when there is a larger separation between outlays and rewards, and when rewards are more uncertain.

Liquidity is more of the problem when the scale of the outlay required is larger.

Liquidity and trust are more important when decisions are irreversible.

Trust is more important when something new is being done.

Trust is more scarce when we are talking about coordination between people without any prior relationship.

These are the problems that money and credit help solve. Abundant money does not just lead people to pay more for the same goods. It shifts their spending toward things that require bigger upfront payments and longer-term commitments, and that are riskier.

I was listening to an interview with an executive from wind-power company on the Odd Lots podcast the other day. “We like to say that our fuel is free,” he said. “But really, our fuel is the cost of capital.” The interest rate matters more for wind power than for gas or coal, because the costs must be paid almost entirely up front, as opposed to when the power is produced. 

When costs and returns are close together, credit is less important.

In settings where ongoing relationships exist, money is less important as a coordinating mechanism. Markets are for arms-length transactions between strangers.

Minsky’s version of the story emphasizes that we have to think about money in terms of two prices, current production and long-lived assets. Long-lived assets must be financed – acquiring one typically requires committing to a series of future payments . So their price is sensitive to the availability of money. An increase in the money supply — contra Hume, contra Meyer — does not raise all prices in unison. It disproportionately raises the price of long-lived assets, encouraging production of them. And it is long-lived assets that are the basis of modern industrial production.

The relative value of capital goods, and the choice between more and less capital-intensive production techniques, depends on the rate of interest. Capital goods – and the corporations and other long-lived entities that make use of them – are by their nature illiquid. The willingness of wealth owners to commit their wealth to these forms depends, therefore, on the availability of liquidity. We cannot analyze conditions of production in non-monetary terms first and then afterward add money and interest to the story.  Conditions of production themselves depend fundamentally on the network of money payments and commitments that structure them, and how flexible that network is.

*

Taking money seriously requires us to reconceptualize the real economy. 

The idea of the interest rate as the price of saving assumes, as I mentioned before, that output already exists to be either consumed or saved. Similarly, the idea of interest as an intertemporal price — the price of time, as the ECB has it — implies that future output is already determined, at least probabilistically. We can’t trade off current consumption against future consumption unless future consumption already exists for us to trade.

Wicksell, who did as much as anyone to create the natural-rate framework of today’s central banks, captured this aspect of it perfectly when he compared economic growth to wine barrels aging in the cellar. The wine is already there. The problem is just deciding when to open the barrels — you would like to have some wine now, but you know the wine will get better if you wait.

In policy contexts, this corresponds to the idea of a level of potential output (or full employment) that is given from the supply side. The productive capacity of the economy is already there; the most that money, or demand, can accomplish is managing aggregate spending so that production stays close to that capacity.

This is the perspective from which someone like Lawrence Meyer, or Paul Krugman for that matter, says that monetary policy can only affect prices in the long run. They assume that potential output is already given.

But one of the big lessons we have learned from the past 15 years of macroeconomic instability is that the economy’s productive potential is much more unstable, and much less certain, than economists used to think. We’ve seen that the labor force grows and shrinks in response to labor market conditions. We’ve seen that investment and productivity growth are highly sensitive to demand. If a lack of spending causes output to fall short of potential today, potential will be lower tomorrow. And if the economy runs hot for a while, potential output will rise.

We can see the same thing at the level of individual industries. One of the most striking, and encouraging developments of recent years has been the rapid fall in costs for renewable energy generation. It is clear that this fall in costs is the result, as much as the cause, of the rapid growth in spending on these technologies. And that in turn is largely due to successful policies to direct credit to those areas. 

A perspective that sees money as epiphenomenal to the “real economy” of production would have ruled out that possibility.

This sort of learning by doing is ubiquitous in the real world. Economists prefer to assume decreasing returns only because that’s an easy way to get a unique market equilibrium. 

This is one area where formal economics and everyday intuition diverge sharply. Ask someone whether they think that buying more or something, or making more of something, will cause the unit price to go up or down. If you reserve a block of hotel rooms, will the rooms be cheaper or more expensive than if you reserve just one? And then think about what this implies about the slope of the supply curve.

There’s a wonderful story by the great German-Mexican writer B. Traven called “Assembly Line.” The story gets its subversive humor from a confrontation between an American businessman, who takes it for granted that costs should decline with output, and a village artisan who insists on actually behaving like the textbook producer in a world of decreasing returns.

In modern economies, if not in the village, the businessman’s intuition is correct. Increasing returns are very much the normal case. This means that multiple equilibria and path dependence are the rule. And — bringing us back to money — that means that what can be produced, and at what cost, is a function of how spending has been directed in the past. 

Taking money seriously, as its own autonomous social domain, means recognizing that social and material reality is not like money. We cannot think of it in terms of a set of existing objects to be allocated, between uses or over time. Production is not a quantity of capital and a quantity of labor being combined in a production function. It is organized human activity, coordinated in a variety of ways, aimed at open-ended transformation of the world whose results are not knowable in advance.

On a negative side, this means we should be skeptical about any economic concept described as “natural” or “real”. These are very often an attempt to smuggle in a vision of a non monetary economy fundamentally different from our own, or to disguise a normative claim as a positive one, or both.

For example, we should be cautious about “real” interest rates. This term is ubiquitous, but it implicitly suggests that the underlying transaction is a swap of goods today for goods tomorrow, which just happens to take monetary form. But in fact it’s a swap of IOUs — one set of money payments for another. There’s no reason that the relative price of money versus commodities would come into it. 

And in fact, when we look historically, before the era of inflation-targeting central banks there was no particular relationship between inflation and interest rates.

We should also be skeptical of the idea of real GDP, or the price level. That’s another big theme of the book, but it’s beyond the scope of today’s talk.

On the positive side, this perspective is, I think, essential preparation to explore when and in what contexts finance matters for production. Obviously, in reality, most production coordinated in non-market ways, both within firms — which are planned economies internally — and through various forms of economy-wide planning. But there are also cases where the distribution of monetary claims through the financial system is very important. Understanding which specific activities are credit-constrained, and in what circumstances, seems like an important research area to me, especially in the context of climate change. 

*

Let me mention one more direction in which I think this perspective points us.

As I suggested, the idea of the interest rate as the price of time, and the larger real-exchange vision of which it is part, treats money flows and aggregates as stand-ins for an underlying nonmonetary real economy. People who take this view tend not be especially concerned with exactly how the monetary values are constructed. Which rate, out of the complex of interest rates, is “the” interest rate? Which f the various possible inflation rates, and over what period, do we subtract to get the “real” interest rate? What payments exactly are included in GDP, and what do we do if that changes, or if it’s different in different countries? 

If we think of the monetary values as just proxies for some underlying “real” value, the answers to these questions don’t really matter. 

I was reading a paper recently that used the intensity of nighttime illumination  across the Earth’s surface as an alternative measure of real output. It’s an interesting exercise. But obviously, if that’s the spirit you are approaching GDP in, you don’t worry about how the value of financial services is calculated, or on what basis we are imputing the services of owner-occupied housing.  The number produced by the BEA is just another proxy for the true value of real output, that you can approximate in all kinds of other ways.

On the other hand, if you think that the money values are what is actually real — if you don’t think they are proxies for any underlying material quantity — then you have to be very concerned with the way they are calculated. If the interest rate really does mean the payments on a loan contract, and not some hypothetical exchange rate between the past and the future, then you have to be clear about which loan contract you have in mind.

Along the same lines, most economists treat the object of inquiry as the underlying causal relationships in the economy, those “fundamental structural characteristics” that are supposed to be stable over time. Recall that the natural rate of interest is explicitly defined with respect to a long run equilibrium where all macroeconomic variables are constant, or growing at a constant rate. If that’s how you think of what you are doing, then specific historical developments are interesting at most as case studies, or as motivations for the real work, which consists of timeless formal models.

But if we take money seriously, then we don’t need to postulate this kind of underlying deep structure. If we don’t think of interest in terms of a tradeoff between the present and the future, then we don’t need to think of future income and output as being in any sense already determined. And if money matters for the activity of production, both as financing for investment and as demand, then there is no reason to think the actual evolution of the economy can be understood in terms of a long-run trend determined by fundamentals. 

The only sensible object of inquiry in this case is particular events that have happened, or might happen. 

Approaching our subject this way means working in terms of the variables we actually observe and measure. If we study GDP, it is GDP as the national accountants actually define it and measure it, not “output” in the abstract. These variables are generally monetary. 

It means focusing on explanations for specific historical developments, rather than modeling the behavior of “the economy” in the abstract.

It means elevating descriptive work over the kinds of causal questions that economists usually ask. Which means broadening our empirical toolkit away from econometrics. 

These methodological suggestions might seem far removed from alternative accounts of the interest rate. But as Arjun and I have worked on this book, we’ve become convinced that the two are closely related. Taking money seriously, and rejecting conventional ideas of the real economy, have far-reaching implications for how we do economics.  

Recognizing that money is its own domain allows us to see productive activity as an open-ended historical process, rather than a static problem of allocation. By focusing on money, we can get a clearer view of the non-monetary world — and, hopefully, be in a better position to change it. 

At Barron’s: Are Low Rates to Blame for Bubbles?

(I write a monthly opinion piece for Barron’s. These sometimes run in the print edition, which I appreciate — it’s a vote of confidence from the editors, and means more readers. It does impose a tighter word count limit, though. The text below is the longer version I originally submitted. The version that was published is here. All of my previous Barron’s pieces are here.)

The past year has seen a parade of financial failures and asset crashes. Silicon Valley bank was the first bank failure since 2020, and the biggest since 2008. Before that came the collapse of FTX, and of much of the larger crypto ecosystem. Corporate bankruptcies are coming faster than at any time since 2011.  Even luxury watches are in freefall. 

The proximate cause of much of this turmoil is the rise in interest rates. So it’s natural to ask if the converse is true. Is the overvaluing of so many worthless assets  – whether through bubbles or fraud – the fault of a decade-plus of low rates? For those who believe this, the long period of low rates following the global financial crisis fueled an “everything bubble”, just as the earlier period of low rates fueled the housing boom of the 2000s. The rise of fragile or fraudulent institutions, which float up on easy credit before inevitably crashing back to earth, is a sign that monetary policy should never have been so loose. As journalist Rana Foorohar put it in a much-discussed article, “Keeping rates too low for too long encourages speculation and debt bubbles.”

You can find versions of this argument being made by  prominent Keynesians, as well as by economists of a more conservative bent. At the Bank for International Settlements “too low for too long” is practically a mantra. But, does the story make sense?

Yes, low interest rates are associated mean high asset prices. But that’s not the same as a bubble.To the extent an asset represents a stream of future payments, a low discount rate should raise its value. 

On the other hand, asset prices are not just about discounted future income streams; they also incorporate a bet on the future price of the asset itself. If a fall in interest rates leads to a rise in asset prices, market participants may mistakenly expect that rise to continue. That could lead to assets being overvalued even relative to the current low rates.

Another argument one sometimes hears for why low rates lead to bubbles is that when income from safe assets is low, investors will “reach for yield” by taking on more risk, bidding up the price of more speculative assets. Investors’ own liabilities also matter. When it’s cheap and easy to borrow, an asset may be attractive that wouldn’t be if financing were harder to come by.

But if low interest rates make acquiring risky assets more attractive, is that a problem? After all, that’s how monetary policy is supposed to work. The goal of rate cuts is precisely to encourage investment spending that wouldn’t happen if rates were higher.  As I argued recently, it’s not clear that most business investment is very responsive to interest rates. But whether the effect on the economy is strong or weak,  “low interest rates cause people to buy assets they otherwise wouldn’t” is just monetary policy working as intended.

Still, intended results may have unintended consequences. When people are reaching for yield, the argument goes, they are more likely to buy into projects that turn out to be driven by fraud, hype or fantasy.

Arguments for the dangers of low rates tend to take this last step for granted. But it’s not obvious why an environment of low yields should be more favorable to frauds. Projects with modest expected returns are, after all, much more common than projects with very high ones; when risk-free returns are very low, there should be more legitimate higher-yielding alternatives, and less need for risky long shots. Conversely, it is the projects that promise very high returns that are most likely to be frauds  — and that are viable at very high rates.

Certainly this was Adam Smith’s view. For him, the danger of speculation and fraud was not an argument for high interest rates, but the opposite. If legal interest rates were “so high as 8 or 10 percent,” he believed, then “the greater part of the money which was to be lent would be lent to prodigals and projectors, who alone would be willing to give this high interest. Sober people … would not venture into the competition.” 

The FTX saga is an excellent example. At one point, Sam Bankman-Fried—a projector and prodigal if ever there was one—offered as much as 20% on new loans to his hedge fund, Alameda, according to The Wall Street Journal. It wouldn’t take low rates to make that attractive — if he was good for it. But, of course, he was not. And that is the crux of the problem. Someone like Bankman-Fried is not offering a product with low but positive returns, that would be attractive only when rates are low but not when they were high. He was offering a product with an expected return that, in retrospect, was in the vicinity of -100 percent. Giving  him your money to him would be a bad idea at any interest rate. 

We can debate what it would take to prevent fraud-fueled bubbles in assets like cryptocurrency. Perhaps it calls for tighter restrictions on the kinds of products that can be offered for sale, or more stringent rules on the choices of retail investors. Or perhaps, given crypto’s isolation from the broader financial system, this is a case where it’s ok to just let the buyer beware. In any case, the problem was not that crypto offered higher returns than the alternative. The problem was that people believed the returns in crypto were much higher than they actually were. Is this a problem that interest rates can solve?

Let’s suppose for the sake of argument that it is. Suppose that without the option of risk-free returns of 3 or 4 or 5 percent, people will throw their money away on crazy longshots and obvious frauds. If you take this idea seriously, it has some funny implications. Normally, when we ask why asset owners are entitled to their income in the first place, the answer is that it’s an incentive to pick out the projects with the highest returns. (Hopefully these are also the most socially useful ones.) The “too low for too long” argument turns this logic on its head. It says that asset owners need to be guaranteed high returns because they can’t tell a good project from a bad one.

That said, there is one convincing version of this story. For all the reasons above, it does not make sense to think of ordinary investors being driven toward dangerous speculation by low interest rates. Institutions like insurance and pension funds are a different matter. They have long-term liabilities that are more or less fixed and, critically, independent of interest rates. Their long investment horizons mean their loss of income from lower rates will normally outweigh their capital gains when they fall. (This is one thing the BIS surely gets right.) When the alternative is insolvency, it can make sense to choose a project where the expected return is negative, if it offers a chance of getting out of the hole. That’s a common explanation for the seemingly irresponsible loans made by many Savings & Loans in the 1980s—faced with bankruptcy, they “gambled for resurrection.” One can imagine other institutions making a similar choice.

What broke the S&Ls in was high rates, not low ones. But there is a common thread. A structure set up when interest rates are in a certain range may not work when they move outside of it. A balance sheet set up on the basis of interest rates in some range will have problems if they move outside it. 

Modern economies depend on a vast web of payment expectations and commitments stretching far into the future. Changes in interest rates modify many change of those future payments; whether upward or downward, this means disappointed expectations and broken commitments. 

If the recent period of low rates was financially destabilizing,  then, the problem wasn’t the not low rates in themselves. It was that they weren’t what was planned on. If the Fed is going to draw general lessons from the bubbles that are now popping, it should not be about the dangers of low rates, but that of drastic and unexpected moves in either direction. 

At Barron’s: Americans Owe Less Than They Used To. Will the Fed Change That?

(I write a monthly opinion piece for Barron’s. This one was published there in September.)

Almost everyone, it seems, now agrees that higher interest rates mean economic pain. This pain is usually thought of in terms of lost jobs and shuttered businesses. Those costs are very real. But there’s another cost of rate increases that is less discussed: their effect on balance sheets.

Economists tend to frame the effects of interest rates in terms of incentives for new borrowing. As with (almost) anything else, if loans cost more, people will take less of them. But interest rates don’t matter only for new borrowers, they also affect people who borrowed in the past. As debt rolls over, higher or lower current rates get passed on to the servicing costs of existing debt. The effect of interest rate changes on the burden of existing debt can dwarf their effect on new borrowing—especially when debt is already high.

Let’s step back for a moment from current debates. One of the central macroeconomic stories of recent decades is the rise in household debt. In 1984, it was a bit over 60% of disposable income, a ratio that had hardly changed since 1960. But over the next quarter-century, debt-income ratios would double, reaching 130%. This rise in household debt was the background of the worldwide financial crisis of 2007-2008, and made household debt a live political question for the first time in modern American history.

Household debt peaked in 2008; it has since fallen almost as quickly as it rose. On the eve of the pandemic, the aggregate household debt-income ratio stood at 92%—still high, by historical standards, but far lower than a decade before.

These dramatic swings are often explained in terms of household behavior. For some on the political right, rising debt in the 1984-2008 period was the result of misguided government programs that encouraged excessive borrowing, and perhaps also a symptom of cultural shifts that undermined responsible financial management. On the political left, it was more likely to be seen as the result of financial deregulation that encouraged irresponsible lending, along with income inequality that pushed those lower down the income ladder to spend beyond their means.

Perhaps the one thing these two sides would agree on is that a higher debt burden is the result of more borrowing.

But as economist Arjun Jayadev and I have shown in a series of papers, this isn’t necessarily so. During much of the period of rising debt, households borrowed less on average than during the 1960s and 1970s. Not more. So what changed? In the earlier period, low interest rates and faster nominal income growth meant that a higher level of debt-financed expenditure was consistent with stable debt-income ratios.

The rise in debt ratios between 1984 and 2008, we found, was not mainly a story of people borrowing more. Rather, it was a shift in macroeconomic conditions that meant that the same level of borrowing that had been sustainable in a high-growth, low-interest era was unsustainable in the higher-interest environment that followed the steep rate hikes under Federal Reserve Chair Paul Volcker. With higher rates, a level of spending on houses, cars, education and other debt-financed assets that would previously have been consistent with a constant debt-income ratio, now led to a rising one.

(Yes, there would later be a big rise in borrowing during the housing boom of the 2000s. But this is not the whole story, or even the biggest part of it.)

Similarly, the fall in debt after 2008 in part reflects sharply reduced borrowing in the wake of the crisis—but only in part. Defaults, which resulted in the writing-off of about 10% of household debt over 2008-2012, also played a role. More important were the low interest rates of these years. Thanks to low rates, the overall debt burden continued to fall even as households began to borrow again.

In effect, low rates mean that the same fraction of income devoted to debt service leads to a larger fall in principal—a dynamic any homeowner can understand.

The figure nearby illustrates the relative contributions of low rates and reduced borrowing to the fall in debt ratios after 2008. The heavy black line is the actual path of the aggregate household debt-income ratio. The red line shows the path it would have followed if households had not reduced their borrowing after 2008, but instead had continued to take on the same amount of new debt (as a share of their income) as they did on average during the previous 25 years of rising debt. The blue line shows what would have happened to the debt ratio if households had borrowed as much as they actually did, but had faced the average effective interest rate of that earlier period.

As you can see, both reduced borrowing and lower rates were necessary for household debt to fall. Hold either one constant at its earlier level, and household debt would today be approaching 150% of disposable income. Note also that households were paying down debt mainly during the crisis itself and its immediate aftermath—that’s where the red and black lines diverge sharply. Since 2014, as household spending has picked up again, it’s only thanks to low rates that debt burdens have continued to fall.

(Yes, most household debt is in the form of fixed-rate mortgages. But over time, as families move homes or refinance, the effective interest rate on their debt tends to follow the rate set by the Fed.)

The rebuilding of household finances is an important but seldom-acknowledged benefit of the decade of ultra-low rates after 2007. It’s a big reason why the U.S. economy weathered the pandemic with relatively little damage, and why it’s growing so resiliently today.

And that brings us back to the present. If low rates relieved the burden of debt on American families, will rate hikes put them back on an unsustainable path?

The danger is certainly real. While almost all the discussion of rate hikes focuses on their effects on new borrowing, their effects on the burden of existing debt are arguably more important. The 1980s—often seen as an inflation-control success story—are a cautionary tale in this respect. Even though household borrowing fell in the 1980s, debt burdens still rose. The developing world—where foreign borrowing had soared in response to the oil shock—fared much worse.

Yes, with higher rates people will borrow less. But it’s unlikely they will borrow enough less to offset the increased burden of the debt they already have. The main assets financed by credit—houses, cars, and college degrees—are deeply woven into American life, and can’t be easily foregone. It’s a safe bet that a prolonged period of high rates will result in families carrying more debt, not less.

That said, there are reasons for optimism. Interest rates are still low by historical standards. The improvement in household finances during the post-2008 decade was reinforced by the substantial income-support programs in the relief packages Congress passed in response to the pandemic; this will not be reversed quickly. Continued strong growth in employment means rising household incomes, which, mechanically, pushes down the debt-income ratio.

Student debt cancellation is also well-timed in this respect. Despite the fears of some, debt forgiveness will not boost  current demand—no interest has been paid on this debt since March 2020, so the immediate effect on spending will be minimal. But forgiveness will improve household balance sheets, offsetting some of the effect of interest rate hikes and encouraging spending in the future, when the economy may be struggling with too little demand rather than (arguably) too much.

Reducing the burden of debt is also one of the few silver linings of inflation. It’s often assumed that if people’s incomes are rising at the same pace as the prices of the things they buy, they are no better off. But strictly speaking, this isn’t true—income is used for servicing debt as well as for buying things. Even if real incomes are stagnant or falling, rising nominal incomes reduce the burden of existing debt. This is not an argument that high inflation is a good thing. But even bad things can have benefits as well as costs.

Will we look back on this moment as the beginning of a new era of financial instability, as families, businesses, and governments find themselves unable to keep up with the rising costs of servicing their debt? Or will the Fed be able to declare victory before it has done too much damage? At this point, it’s hard to say.

Either way we should focus less on how monetary policy affects incentives, and more time on how it affects the existing structure of assets and liabilities. The Fed’s ability to steer real variables like GDP and employment in real time has, I think, been greatly exaggerated. Its long-run influence over the financial system is a different story entirely.

Fisher Dynamics Revisited

Back in the 2010s, Arjun Jayadev and I wrote a pair of papers (one, two) on the evolution of debt-income ratios for US households. This post updates a couple key findings from those papers. (The new stuff begins at the table below.)

Rather than econometric exercises, the papers were based on a historical accounting decomposition —  an approach that I think could be used much more widely. We separated changes in the debt-income ratio into six components — the primary deficit (borrowing net of debt service payments); interest payments; real income growth; inflation; and write downs of debt through default — and calculated the contribution of each to the change in debt ratios over various periods. This is something that is sometimes done for sovereign debt but, as far as I know, we were the first to do it for private debt-income ratios.

We referred to the contributions of the non-borrowing components as “Fisher dynamics,” in honor of Irving Fisher’s seminal paper on depressions as “debt deflations.” A key aspect of the debt-deflation story was that when nominal incomes fell, the burden of debt could rise even as debtors sharply reduced new borrowing and devoted a greater share of their income to paying down existing debt. In Fisher’s view, this was one of the central dynamics of the Great Depression. Our argument was that something like a slow-motion version of this took place in the US (and perhaps elsewhere) in recent decades.

The logic here is that the change in debt-income ratios is a function not only of new borrowing but also of the effects of interest, inflation and (real) income growth on the existing debt ratio, as well as of charge offs due to defaults.

Imagine you have a mortgage equal to double your annual income. That ratio can go down if your current spending is less than your income, so that you can devote part of your income to paying off the principal. Or it can go down if your income rises, i.e. by raising the denominator rather than lowering the numerator. It can also go down if you refinance at a lower interest rate; then the same fraction of your income devoted to debt service will pay down the principal faster. Our of course it can go down if some or all of it is written off in bankruptcy.

It is possible to decompose actual historical changes in debt-income ratios for any economic unit or sector into these various factors. The details are in either of the papers linked above. One critical point to note: The contributions of debt and income growth are proportional to the existing debt ratio, so the higher it already is, the more important these factors are relative to the current surplus or deficit.

Breaking out changes in debt ratios into these components was what we did in the two papers. (The second paper also explored alternative decompositions to look at the relationship been debt ratio changes and new demand from the household sector.) The thing we wanted to explain was why some periods saw rising debt-income ratios while others saw stable or falling ones.

While debt–income ratios were roughly stable for the household sector in the 1960s and 1970s, they rose sharply starting in the early 1980s. The rise in household leverage after 1980 is normally explained in terms of higher household borrowing. But increased household borrowing cannot explain the rise in household debt after 1980, as the net flow of funds to households through credit markets was substantially lower in this period than in earlier postwar decades. During the housing boom period of 2000–2007, there was indeed a large increase in household borrowing. But this is not the case for the earlier rise in household leverage in 1983–1990, when the debt– income ratios rose by 20 points despite a sharp fall in new borrowing by households.

As we explained:

For both the 1980s episode of rising leverage and for the post-1980 period as a whole, the entire rise in debt–income ratios is explained by the rise in nominal interest rates relative to nominal income growth. Unlike the debt deflation of the 1930s, this ‘debt disinflation’ has received little attention from economists or in policy discussions.

Over the full 1984–2011 period, the household sector debt–income ratio almost exactly doubled… Over the preceding 20 years, debt–income ratios were essentially constant. Yet households ran cumulative primary deficits equal to just 3 percent of income over 1984–2012 (compared to 20 percent in the preceding period). The entire growth of household debt after 1983 is explained by the combination of higher interest payments, which contributed an additional 3.3 points per year to leverage after 1983 compared with the prior period, and lower inflation, which reduced leverage by 1.3 points per year less.

We concluded:

From a policy standpoint, the most important implication of this analysis is that in an environment where leverage is already high and interest rates significantly exceed growth rates, a sustained reduction in household debt–income ratios probably cannot be brought about solely or mainly via reduced expenditure relative to income. …There is an additional challenge, not discussed in this paper, but central to both Fisher’s original account and more recent discussions of ‘balance sheet recessions’: reduced expenditure by one sector must be balanced by increased expenditure by another, or it will simply result in lower incomes and/or prices, potentially increasing leverage rather than decreasing it. To the extent that households have been able to run primary surpluses since 2008, it has been due mainly to large federal deficits and improvement in US net exports.

We conclude that if reducing private leverage is a policy objective, it will require some combination of higher growth, higher inflation, lower interest rates, and higher rates of debt chargeoffs. In the absence of income growth well above historical averages, lower nominal interest rates and/or higher inflation will be essential. … Deleveraging via low interest rates …  implies a fundamental shift in monetary policy. If interest-rate policy is guided by the desired trajectory of debt ratios, it no longer can be the primary instrument assigned to managing aggregate demand. This probably also implies a broader array of interventions to hold down market rates beyond traditional open market operations, policies sometimes referred to as ‘financial repression.’ Historically, policies of financial repression have been central to almost all episodes where private (or public) leverage was reduced without either high inflation or large-scale repudiation.

These papers only went through 2011. I’ve thought for a while it would be interesting to revisit this analysis for the more recent period of falling household debt ratios. 

With the help of Arjun’s student Advait Moharir, we’ve now brought the same analysis forward to the end of 2019. Stopping there was partly a matter of data availability — the BEA series on interest payments we use is published with a considerable lag. But it’s also a logical period to look at, since it brings us up to the start of the pandemic, which one would want to split off anyway.

The table below is a reworked version of tables in the two papers, updated through 2019. (I’ve also adjusted the periodization slightly.) 

Due to …
Period Annual PP Change in Debt Ratio Primary Deficit Interest Growth Inflation Defaults
1929 – 1931 3.7 -5.5 2.9 2.8 2.9 *
1932 – 1939 -1.2 -1.5 2.4 -1.6 -0.7 *
1940 – 1944 -3.8 -1.6 1.3 -2.5 -1.9 *
1945 – 1963 2.6 2.5 2.6 -1.5 -0.8 *
1964 – 1983 0.0 0.8 5.1 -2.4 -3.5 *
1984 – 1999 1.7 -0.3 7.5 -2.9 -2.1 -0.4
2000 – 2008 4.5 2.4 7.2 -1.7 -2.5 -0.8
2009 – 2013 -5.4 -3.7 5.8 -3.1 -2.3 -2.4
2014 – 2019 -2.0 -1.4 4.6 -3.4 -1.3 -0.6

Again, our central finding in the earlier papers was that if we compare the 1984-2008 period of rising debt ratios to the previous two decades of stable debt ratios, there was no rise in the primary deficit. For 1984-2008 as a whole, annual new borrowing exceeded debt service payments by 0.7 percent of income on average, almost exactly the same as during the 1964-1983 period. (That’s the weighted average of the two sub-periods shown in the table.) Even during the housing boom period, when new borrowing did significantly exceed debt service, this explained barely a third of the difference in annual debt-ratio growth (1.6 out of 4.5 points).

The question now is, what has happened since 2008? What has driven the fall in debt ratios from 130 percent of household income in 2008 to 92 percent on the eve of the pandemic?

In the immediate aftermath of the crisis, sharply reduced borrowing was indeed the main story. Of the 10-point swing in annual debt-ratio growth (from positive 4.5 points per year to negative 5.4), 6 points is accounted for by the fall in net borrowing (plus another 1.5 points from higher defaults). But for the 2014-2019 period, the picture is more mixed. Comparing those six years to the whole 1984-2008 period of rising debt, we have a 4.7 point shift in debt ratio growth, from positive 2.7 to negative 2. Of that, 2.1 points is explained by lower net borrowing, while almost 3 points is explained by lower interest. (The contribution of nominal income growth was similar in the two periods.) So if we ask why household debt ratios continued to fall over the past decade, rather than resuming their rise after the immediate crisis period, sustained low interest rates are at least as important as household spending decisions. 

Another way to see this is in the following graph, which compares three trajectories: The actual one in black, and two counterfactuals in red and blue. The red counterfactual is constructed by combining the average 1984-2008 level of net borrowing as a fraction of income to the actual historical rates of interest, nominal income growth and defaults. The blue counterfactual is similarly constructed by combining the average 1984-2008 effective interest rate with historical levels of net borrowing, nominal income growth and defaults. In other words, the red line shows what would have happened in a world where households had continued to borrow as much after 2008 as in the earlier period, while the blue line shows what would have happened if households had faced the same interest rates after 2008 as before. 

As the figure shows, over the 2008-2019 period as a whole, the influence of the two factors is similar — both lines end up in the same place. But the timing of their impact is different. In the immediate wake of the crisis, the fall in new borrowing was decisive — that’s why the red and black lines diverge so sharply. But in the later part of the decade, as household borrowing moved back toward positive territory and interest rates continued to fall, the more favorable interest environment became more important. That’s why the blue line starts rising after 2012 — if interest rates had been at their earlier level, the borrowing we actually saw in the late 2010s would have implied rising debt ratios. 

As with the similar figures in the papers, this figure was constructed by using the law of motion for debt ratios:

where b is the debt-income ratio, d is the primary deficit, is the effective interest rate (i.e. total interest payments divided by the stock of debt), g is income growth adjusted for inflation, π is the inflation rate, and sfa is a stock-flow adjustment term, in this case the reduction of debt due to defaults. The exact sources and definitions for the various variables can be found in the papers. (One note: We do not have a direct measurement of the fraction of household debt written off by default for the more recent period, only the fraction of such debt written down by commercial banks. So we assumed that the ratio of commercial bank writeoffs of household debt to total writeoffs was the same for the most recent period as for the period in which we have data for both.)

Starting from the actual debt-ratio in the baseline year (in this case, 2007), each year’s ending debt-income ratio is calculated using the primary deficit (i.e. borrowing net of debt service payments), the share of debt written off in default, nominal income growth and the interest rate. All but one of these variables are the actual historical values; for one, I instead use the average value for 1984-2007. This shows what the path of the debt ratio would have been if that variable had been fixed at its earlier level while the others evolved as they did historically.  In effect, the difference between these counterfactual lines and the historical one shows the contribution of that variable to the difference between the two periods.

Note that the interest rate here is not the current market rate, but the effective or average rate, that is, total interest payments divided by the stock of debt. For US households, this fell from around 6 percent in 2007 to 4.4 percent by 2019 — less than the policy rate did, but still enough to create a very different trajectory, especially given the compounding effect of interest on debt over time. So while expansionary monetary policy is not the whole story of falling debt ratios since 2008, it was an important part of it. As I recently argued in Barrons, the deleveraging of US households is unimportant and under appreciated benefit of the decade of low interest rates after the crisis.