FTPL news: discount and Economist list

 

Just in time for the holidays, the perfect stocking stuffer -- if you have really big stockings. 30% discount on Fiscal Theory of the Price Level until June 30 2024. 

And Fiscal Theory makes the Economist's list of best books for 2023. 

Interest rates and inflation part 2: Losing faith in VARs

(This post continues part 1 which just looked at the data. Part 3 on theory is here) 

When the Fed raises interest rates, how does inflation respond? Are there "long and variable lags" to inflation and output?  

There is a standard story: The Fed raises interest rates; inflation is sticky so real interest rates (interest rate - inflation) rise; higher real interest rates lower output and employment; the softer economy pushes inflation down. Each of these is a lagged effect. But despite 40 years of effort, theory struggles to substantiate that story (next post), it's had to see in the data (last post), and the empirical work is ephemeral -- this post.  

The vector autoregression and related local projection are today the standard empirical tools to address how monetary policy affects the economy, and have been since Chris Sims' great work in the 1970s. (See Larry Christiano's review.) 

I am losing faith in the method and results. We need to find new ways to learn about the effects of monetary policy. This post expands on some thoughts on this topic in "Expectations and the Neutrality of Interest Rates," several of my papers from the 1990s* and excellent recent reviews from Valerie Ramey and  Emi Nakamura and Jón Steinsson, who  eloquently summarize the hard identification and computation troubles of contemporary empirical work.

Maybe popular wisdom is right, and economics just has to catch up. Perhaps we will. But a popular belief that does not have solid scientific theory and empirical backing, despite a 40 year effort for models and data that will provide the desired answer, must be a bit less trustworthy than one that does have such foundations. Practical people should consider that the Fed may be less powerful than traditionally thought, and that its interest rate policy has different effects than commonly thought. Whether and under what conditions high interest rates lower inflation, whether they do so with long and variable but nonetheless predictable and exploitable lags, is much less certain than you think. 

New York Times on HANK, and questions

By the standards of mainstream media coverage of technical economics, Peter Coy's coverage of HANK (Heterogeneous Agent New Keynesian) models in the New York Times was actually pretty good. 

1) Representative agents and distributions. 

Yes, it starts with the usual misunderstanding about "representative agents," that models assume we are all the same. Some of this is the standard journalist's response to all economic models: we have simplified the assumptions, we need more general assumptions. They don't understand that the genius of economic theory lies precisely in finding simplified but tractable assumptions that tell the main story. Progress never comes from putting more ingredients and stirring the pot to see what comes out. (I mean you, third year graduate students looking for a thesis topic.) 

But in this case many economists are also confused on this issue. I've been to quite a few HANK seminars in which prominent academics waste 10 minutes or so dumping on the "assumption that everyone is identical." 

There is a beautiful old theorem, called the "social welfare function." (I learned this in graduate school in fall 1979, from Hal Varian's excellent textbook.) People can have almost arbitrarily different preferences (utility functions), incomes and shocks, companies can have almost arbitrarily different characteristics (production functions),  yet the aggregate economy behaves as if there is a single representative consumer and representative firm. The equilibrium path of aggregate consumption, output,  investment, employment, and the prices and interest rates of that equilibrium are the same as those of an economy where everyone and every firm is the same, with a "representative agent" consumption function and "representative firm" production function.  Moreover, the representative agent utility function and representative firm production function need not look anything like those of any particular individual person and firm. If I have power utility and you have quadratic utility, the economy behaves as if there is a single consumer with something in between. 

Defining the job of macroeconomics to understand the movement over time of aggregates -- how do GDP, consumption, investment, employment, price level, interest rates, stock prices etc. move over time, and how do policies affect those movements -- macroeconomics can ignore microeconomics. (We'll get back to that definition in a moment.) 

Papers: Dew-Becker on Networks

I've been reading a lot of macro lately. In part, I'm just catching up from a few years of book writing. In part,  I want to understand inflation dynamics, the quest set forth in "expectations and the neutrality of interest rates," and an  obvious next step in the fiscal theory program. Perhaps blog readers might find interesting some summaries of recent papers, when there is a great idea that can be summarized without a huge amount of math. So, I start a series on cool papers I'm reading. 

Today: "Tail risk in production networks" by Ian Dew-Becker, a beautiful paper. A "production network" approach recognizes that each firm buys from others, and models this interconnection. It's a hot topic for lots of reasons, below.  I'm interested because prices cascading through production networks might induce a better model of inflation dynamics. 

(This post uses Mathjax equations. If you're seeing garbage like [\alpha = \beta] then come back to the source  here.) 

To Ian's paper: Each firm uses other firms' outputs as inputs. Now, hit the economy with a vector of productivity shocks. Some firms get more productive, some get less productive. The more productive ones will expand and lower prices, but that changes everyone's input prices too. Where does it all settle down? This is the fun question of network economics. 

Ian's central idea: The problem simplifies a lot for large shocks. Usually when problems are complicated we look at first or second order approximations, i.e. for small shocks, obtaining linear or quadratic ("simple") approximations. 

On the x axis, take a vector of productivity shocks for each firm, and scale it up or down. The x axis represents this overall scale. The y axis is GDP. The right hand graph is Ian's point: for large shocks, log GDP becomes linear in log productivity -- really simple. 

Why? Because for large enough shocks, all the networky stuff disappears. Each firm's output moves up or down depending only on one critical input. 

Bob Lucas and his papers

My first post described a few anecdotes about what a warm person Bob Lucas was, and such a great colleague. Here I describe a little bit of his intellectual influence, in a form that is I hope accessible to average people.

The “rational expectations” revolution that brought down Keynesianism in the 1970s was really much larger than that. It was really the “general equilibrium” revolution. 

Macroeconomics until 1970 was sharply different from regular microeconomics. Economics is all about “models,” complete toy economies that we construct via equations and in computer programs. You can’t keep track of everything in even the most beautiful prose. Microeconomic models, and “general equilibrium” as that term was used at the time, wrote down how people behave — how they decide what to buy, how hard to work, whether to save, etc.. Then it similarly described how companies behave and how government behaves. Set this in motion and see where it all settles down; what prices and quantities result. 

Small bank thoughts

 Three small thoughts. 

1) There is much commentary that bank troubles will interfere with the Fed's plan to lower inflation by raising rates. Actually, this is a feature not a bug. The main mechanism by which, in the Fed's view, raising interest rates slows the economy and lowers inflation is by "constricting credit," "tightening financial conditions," lowering borrowing that finances investment and consumer durables purchases.  The Fed didn't want runs, no, but it wants the result. If you don't like that, well, we need to think of other ways to contain inflation, like taking the fiscal gasoline off the fire. 

2) On uninsured deposits. A correspondent suggests that the Fed simply mandate that all large depositors participate in the sorts of services, there for the asking, that split large accounts into multiple $249k accounts spread over multiple banks, or sweeps into money market funds. 

I don't think that mandating this system is a good idea. If you're going to do that, of course, you might as well just insure all deposits and keep it simple. 

But the suggestion prompts doubt over the oft repeated notion that we want large sophisticated depositors to monitor banks. Anyone who was large and sophisticated enough to monitor banks had already gamed the system to make sure their accounts were insured, at some nontrivial cost in fees and trouble. The only people left with millions in checking accounts were, sort of by definition, financially unsophisticated or too busy running actual companies to bother with this sort of thing. Sort of like taxes. 

We might as well give in, that all deposits are here forth insured. If so, of course, then banks are totally gambling with the house's money. But we also have to give in that if they can't spot this elephant in the room, asset risk regulation is hopeless. The only workable answer (of course) is narrow deposit taking -- all runnable deposits invested in reserves and short term treasuries; fund portfolios of long term debt with long-term borrowing (CDs for example) and lots of equity.

3) Liquidity and fixed value are no longer necessarily tied together. I still don't quite get why better payment services are not attached to floating value funds. Then we wouldn't need run-prone bank accounts at all. 

 

Two points on the debt limit, 1 serious 1 fun

Everyone keeps repeating that hitting the debt limit would necessitate a default on principal and interest. The Treasury itself says 

Failing to increase the debt limit would have catastrophic economic consequences. It would cause the government to default on its legal obligations – an unprecedented event in American history. That would precipitate another financial crisis and threaten the jobs and savings of everyday Americans – putting the United States right back in a deep economic hole, just as the country is recovering from the recent recession.   

The first statement is correct. The second is not. The government is still hauling in tax revenues. The Treasury could easily say "given the catastrophe that a default would produce, we will always pay interest and principal on treasury debt before any other payment." Congress could pass a law stating that fact. There is no economic reason  that a debt limit should force a default. 

There is a legal argument, and a claim that the Treasury cannot prioritize debt payments over other legally mandated payments. In the research I've been able to do however, this is a very uncertain claim. And it makes no sense. The Treasury is legally obligated to make debt payments, as it is obligated to pay Social Security checks, and also legally obligated not to borrow. Law prescribes the impossible. It has to prioritize. Indeed, unpaid bills are a form of debt, so if you want  to be a stickler, the government will violate the debt limit no matter what it does. 

The second statement is false. The US has defaulted on  gold clauses in the 1930s. It has defaulted on other "legal obligations."

The third is correct, and appropriate. If we are to tussle over paying Wall Street fat cats vs. grandma's social security, keep in mind just what a catastrophe default would be. Grandma will be way worse off if that happens. Treasury debt is now the golden collateral, supporting most of the financial system. (We should have a financial system much less dependent on short term collateralized borrowing, but that's another story.) If in default it would not be. Worse, and most important here, if financial markets suspect a default will really happen, they will start refusing to accept treasury collateral in the first place. This is basically what happened in 2008 with mortgage backed securities. They didn't fall to pieces,  they just weren't acceptable as collateral any more. 

A flight from treasury collateral under a debt limit would be far worse. And the government's magic tonic, borrow a ton and bail everyone out, would be unavailable. 

Perhaps Treasury thinks that by threatening default, they can get Congress to wake up and raise the debt limit promptly. But this risks Wall Street also believing the threat and causing the panic you're trying to prevent. 

Treasury secretary Janet Yellen should say out loud, right now "we pay principal and interest on treasury debt first, before anything else." President Biden should back her up. Drastic delays in social security, medicine, government shutdown and more are plenty enough threat to get Congress to move, without risking a run. 

States with balanced budget rules are interesting legal precedent. The State of Illinois, while I was watching, simply delayed payments, often by years. It paid its bonds on time. That isn't a good outcome of course, but it represents the State's choice of how to handle the legal requirement to pay vendors and to pay interest and principal on bonds. Other states have defaulted as have cities and counties. And countries. 

*****

Now for fun. Just print money, some say. Fortunately, our legal system is full of mechanisms to prevent the government from printing money instead of borrowing it. The treasury has to issue debt; the Fed has to buy it,  and thereby give the Treasury new money to spend.  That violates the debt limit. But Treasury can create coins. So, last time, the fun suggestion of $1 trillion dollar coins came up. 

Here is a novel proposal in the same sprit. The debt limit is calculated based on face value, not market value of debt. A bond promising $100 in 10 years and $3 coupons from now to then counts as $100 of debt. So issue perpetuities. Or, more realistically, issue coupon only debt.  The government could issue a bond that pays a $3 coupon for 30 years and no principal payment. As things are now calculated, that bond adds zero to the debt! 

Like the trillion dollar coin, this proposal so clearly violates the spirit of the debt limit that I doubt serious people would do it. It does point to a serious shortcoming in how the Treasury calculates debt however. Most of the time Treasury issues debt at par, borrowing $100 and promising to repay $100 in 10 years. Then the distinction does not matter. But the formulas should be fixed. 

Disclaimer: I'm not an expert on the law of the debt limit. If these points are in error, let me know and I'll issue a "never mind." 

****

To clarify, this is just a fun way to get around the debt limit if one wants a fun way to do it. It's not obvious that getting around the debt limit is a good idea. What is the justification for running primary deficits right now? No, I'm not a balanced budget nut. In times of crisis, war, pandemic, and recession, the government should borrow, for standard tax-smoothing reasons. But then the government should repay the debt. When the economy is humming and there is no crisis on, we should be running small steady primary surpluses. That is now. One has to argue that yes, we should get there, and stop borrowing in good times,  but it's too hard to do all of a sudden. But just what are those adjustment costs? A crisis is a terrible thing to waste. Today is as good a day as any to clean up the US long term fiscal mess. It's not clear to me that Washington does anything better if it takes a long time to do it. 

 

Truss Tragedy

(at Project Syndicate)

The Liz Truss Tragedy

The former British prime minister’s downfall holds important lessons for growth-minded policymakers in the United States, Europe, and elsewhere. While her diagnosis of the country’s economic problem was spot on, she fatally mismanaged both the politics and the messaging of her policy response.

STANFORD – Liz Truss’s stint as British prime minister is over, but she was right that the United Kingdom needs growth. Her downfall is tragic, because growth is the only path out of the country’s economic dilemma. 

The UK is surprisingly poor. Its GDP per capita is just $43,000, compared to $60,000 in the United States. The average British home is one-third the size of the average US home. Worse, the country’s economy is not growing. Its GDP per capita is lower than it was in 2007. Productivity – the underlying source of economic growth – has been flat for over a decade. 

The UK desperately needs supply-side reforms. Surging inflation tells us that demand-side stimulus is a spent force. 

Expectations and the Neutrality of Interest Rates

Expectations and the Neutrality of Interest Rates is a new paper. It's an essay, really, expanding on a lunch talk I was privileged to give at the Minneapolis Fed "Foundations of Monetary Policy" conference in honor of the 50th anniversary of Bob Lucas' 1972 "Expectations and the Neutrality of Money." 

Abstract: 

 Lucas (1972) is the pathbreaking analysis of the neutrality and temporary non-neutrality of money. But our central banks set interest rate targets, and do not even pretend to control money supplies. How is inflation determined under an interest rate target? 

We finally have a complete theory of inflation under interest rate targets, that mirrors the long-run neutrality and frictionless limit of monetary theory: Inflation can be stable and determinate under interest rate targets, including a k percent rule, i. e. a peg. The zero bound era is confirmatory evidence. Uncomfortably, long-run neutrality means that higher interest rates eventually produce higher inflation, other things (and fiscal policy in particular) constant. 

With a Phillips curve, we have some non-neutrality as well: Higher nominal interest rates raise real rates and lower output. A good model in which higher interest rates temporarily lower inflation is a harder task. I exhibit one such model. It has the Lucas property that only unexpected interest rate rises can lower inflation. A better model, and empirical understanding, is as crucial to today's agenda as Lucas (1972) was in its day. 

Much of this is contentious. The issues are crucial for policy: Can the Fed contain inflation without dramatically raising interest rates? Given the state of knowledge, a bit of humility is in order. 

 The link also has slides, if you like those. In one slide, I managed to put together the 54 year project to (finally) produce a full theory of inflation under interest rate targets: 

The Phillips Curve

Behold the Phillips curve, one more statistical correlation treated as an eternal verity that our inflationary era has just undermined. 

From 2007 to 2019, the standard observation was "The Phillips curve has become flat." Large changes in unemployment correspond to very little change in inflation, or small changes in inflation correspond to huge changes in unemployment, depending on which causal (mis) reading of the correlation you choose. To the optimist, allowing a tiny bit of inflation could dramatically reduce unemployment. To the pessimist, it would take immense unemployment to do anything about inflation, should we have to.

Then came the pandemic. Unemployment shot up with no change in inflation, right on the curve. 

Then came the inflation. The Phillips curve woke up. It's almost vertical! (The scales of the two axes are different). 

Much Fed and commentator thinking relies on the Phillips curve. It's the central way interest rates affect inflation, in conventional thinking. High interest rates raise real interest rates lower aggregate demand cause unemployment which causes via the Phillips curve, lower inflation. 

Clearly, something is very wrong here. Maybe expectations shift. Maybe supply shocks do matter after all. Surely one should start with a serious dynamic Phillips curve, as most macro literature does. Maybe the Phillips curve is flexible up but sticky down, and the natural rate shifts around.  Maybe prices are sticky until they aren't. As Bob Lucas showed long ago, the slope of the Phillips curve depends on the volatility of inflation. Countries with volatile inflation get no output boost from additional inflation. Thousands of epicycles can be added, and this post is a bit of an invitation to do so. Or maybe the Phillips curve was just a correlation after all, hiding a deeper reality. (My view, but for another blog post). 

In the meantime, it's another good warning not to take statistical correlations too seriously, and certainly not as causally as we tend to do. Such as inflation will always be 2%. Such as real interest rates are on a permanent downward trend? 

This time of inflation will lead us to rewrite an awful lot of macroeconomics. 

Video week

It's been a busy week for video. I started Monday with a good roundtable with Benn Steil at the Council on Foreign Relations "Understanding Inflation and its Causes" 

Tuesday we did a great Goodfellows conversation with Larry Summers. (Audio podcast at that link, plus video if the embed doesn't work.) Larry answers "what would you do at the Fed" much better than I did when Benn asked, among other great topics. 

This week also Casey Weade posted a podcast and video interview we did on Fiscal Theory of the Price Level, for a general audience, at his "Retire with Purpose" podcast. Casey did a great job asking good questions and steering the conversation. Link, including audio podcast

More got recorded, not up yet... a busy week.  

Inflation and the end of illusions.

An oped at Project Syndicate

Inflation’s return marks a tipping point. Demand has hit the brick wall of supply. Our economies are now producing all that they can. Moreover, this inflation is clearly rooted in excessively expansive fiscal policies. While supply shocks can raise the price of one thing relative to others, they do not raise all prices and wages together. 

A lot of wishful thinking will have to be abandoned, starting with the idea that governments can borrow or print as much money as they need to spray at every problem. Government spending must now come from current tax revenues or from credible future tax revenues, to support non-inflationary borrowing. 

Stimulus spending for its own sake is over. Governments must start spending wisely. Spending to “create jobs” is nonsense when there is a widespread labor shortage. 

Unfortunately, many governments are responding to inflation by borrowing or printing even more money to subsidize energy, housing, childcare, and other costs, or to hand out more money to cushion the blow from inflation – for example, by forgiving student loans. These policies will lead to even more inflation. 

Irwin on trade reform

Doug Irwin of Dartmouth gave a really informative talk at the Hoover Economic Policy Working Group, based on his paper The Trade Reform Wave 1985-1995, AER May 2022.  Embed (hopefully) below, or go to the link here.  

 

Doug opened my eyes, hence this post. I love learning something new. I'm a resolute Free Trader. So, naturally, I jump to the answer: Stop protecting industries. Get rid of tariffs. Don't bother with the negotiated mercantilism of trade deals -- the "you can sell to us if our exporters can sell to you" deals. The point of a foreign country's exports is to get dollars, and the point of dollars is for them to buy from the US. Full stop. 

Doug reveals that this story is far too simplistic to understand the closed economies of the 1950s through 1970s, and the great trade liberalization that the world experienced starting in the 1980s -- and which we are very sadly likely to lose in the years ahead. A little reminder of what we gained, and a sad peak: 

The process of liberalization started with money, not tariffs: Countries first devalued overvalued currency, usually to a floating rate. Then they eliminated quantitative restrictions on imports including import licenses. Then they reduced tariffs. 

In turn, how did they get there, and why did they not reform earlier? The standard story pits domestic industry vs. consumers. Domestic industries have concentrated interest in protection, consumers are diffuse. That accounts for status quo bias, but not why they eventually changed. 

The source of the problem, and reason for the change is different. Countries (especially in the "developing" world) were hit with a "terms of trade" shock -- they exported commodities, say, to import goods; the commodity price went down so they could not buy imports. Many countries were financing imports with foreign aid and borrowing, and those transfers dried up. 

What do they do? They have to choose between deflation, currency depreciation, or import controls.  Deflation at the same exchange rate makes foreign goods more expensive. Depreciation does the same, without changing the domestic price level. Or, stop imports by direct controls, and by rationing foreign exchange leading to a black market. In the early postwar view, consistent with Bretton Woods, they chose the latter. (Why is there so much nostalgia for Bretton Woods? It was a rotten system.) 

Naturally, it didn't work. Eventually they gave up and devalued or floated the exchange rate. Now there is no need to ration foreign exchange or to restrict imports by license. (Tariffs are bad, but quantitative restrictions are worse, since you never know what the cost is, and then imports are allocated by political rather than economic reasons. Just paying a tax is more efficient!) They moved to exports in order to generate foreign exchange to buy imports. 

So, Doug answers the central question: 

Why no reform in 1970s? “foreign exchange reserves kill the will to reform” 

Oil and commodity export countries were flush with cash to buy imports. Foreign aid recipients had cash to buy imports. 

Why reform in 1980s?

Era of scarce foreign exchange – all three BOP shocks.

Goal: increase foreign exchange earnings by increasing exports.

Learning from experience – cost of import controls, benefit of exports

Shift from import repression to export promotion to overcome foreign exchange shortage 

And, later, 

Michael Bruno (World Bank): “We did more for Kenya by cutting off aid for one year than by giving them aid for the previous three decades”

Aid lets a country put off reform. 

I asked one question, about the importance of an open capital account. That also used to be gospel, now under debate. Doug's answer was interesting: In these cases, a free currency market was crucial, but free capital markets less so. 

Ideas matter.

This process did not just play out in standard political economy terms, one interest group gains power over another. The shift of ideas in universities, the IMF, central banks, and countries was crucial. I find this heartwarming as a producer of ideas, and terrifying as I watch these successful ideas crumble around me. 

Doug discusses the process of reform in Mexico, (which first had disaster under some bad ideas, then reform when a new group of economists came in), India, South Korea and others. Listen to the talk! 

Concluding slide: 

Inflation speculation

I'm working madly to finish The Fiscal Theory of the Price Level. This is a draft of Chapter 21, on how to think about today's emerging inflation and what lies ahead, through the lens of fiscal theory. (Also available as pdf). I post it here as it may be interesting, but also to solicit input on a very speculative chapter. Help me not to say silly things, in a book that hopefully will last longer than a blog post! Feel free to send comments by email too. 

Chapter 21. The Covid inflation 

As I finish this book's manuscript in Fall 2021, inflation has suddenly revived. You will know more about this event by the time you read this book, in particular whether inflation turned out to be ``transitory,'' as the Fed and Administration currently insist, or longer lasting. This section must be speculative, and I hope rigorous analysis will follow once the facts are known. Still, fiscal theory is supposed to be a framework for thinking about monetary policy, so I would be remiss not to try. 

Figure 1. CPI through the Covid-19 recession.

Figure 1 presents the CPI through the covid recession. Everything looks normal until February 2021. From that point to October 2021 the CPI rose  5.15% (263.161 to 276.724), a 7.8% annual rate.

What happened, at least through the lens of the simple fiscal theory models in this book? Well, from March 2020 through early 2021, the U.S. government -- Treasury and Fed acting together -- created about $3 trillion new money and sent people checks. The Treasury borrowed an additional $2 trillion, and sent people more checks. M2, including checking and savings accounts, went up $5.5 trillion dollars. $5 trillion is a nearly 30% increase in the $17 trillion of debt outstanding at the beginning of the Covid recession. Table 21.1 and Figure 2 summarize. ($3 trillion is the amount of Treasury debt purchased by the Fed, and also the sum of larger reserves and currency.  Federal debt held by the public includes debt held by the Federal Reserve.)

M2, debt, and monetary base (currency + reserves) through the Covid-19 recession.

Some examples: In March 2020, December 2020, and again in March 2021, in response to the deep recession induced by the Covid-19 pandemic, the government sent ``stimulus'' checks, totaling $3,200 to each adult and $2,500 per child. The government added a refundable child tax credit, now up to $3,600per child, and started sending checks immediately. Unemployment compensation, rental assistance, food stamps and so forth sent checks to people. The ``paycheck protection program'' authorized $659 billion to small businesses. And more. The payments were partly designed as economic insurance, transfers from people doing well during covid to those who had lost jobs or businesses, and efforts to keep businesses from failing. But they were also in large part, intentionally, designed as fiscal-monetary stimulus to boost aggregate demand and keep the economy going. The  massive ``infrastructure'' and ``reconciliation'' spending plans occupied the Congress through 2021, adding expectations of more deficits to come.  

From a fiscal-theory perspective, the episode looks like a classic fiscal helicopter drop. There is a large increase in government debt, transferred to people, who do not expect that debt to be repaid. It is a``fiscal shock,'' a decline in surpluses s_t, with no expectation of larger subsequent surpluses. Of course it led to inflation! 

Transitory Inflation: A Fisherian Fed?

Should the Fed raise interest rates fast? Or should it leave them alone, figuring inflation will be "transitory?" 

Lots of models, including ones I play with, predict that a constant unchanging interest-rate peg leads to stable inflation. If there is a fiscal shock, it leads to a one-period price-level jump, but no further inflation, so long as the interest rate stays where it is. The models in the first few chapters of The Fiscal Theory of the Price Level have this feature, also "Michelson Morley, Fisher and Occam.'' Martin Uribe has also written about this issue, here for example. 

The simplest example is \[i_t = E_t \pi_{t+1}\] \[(E_{t+1}-E_t) \pi_{t+1} = -(E_{t+1}-E_t) \sum_{j=0}^{\infty} \rho^j \tilde{s}_{t+j} \] where \(\tilde{s}\) denotes real primary surpluses scaled by the value of debt. If the interest rate \(i_t\) does not move, expected inflation does not move. A fiscal shock (negative \(\tilde{s}\) ) gives a one-period unexpected inflation, devaluing outstanding debt; essentially a Lucas-Stokey state-contingent default. Sticky prices smooth all this out over a year or two. 

You can replace the latter with standard new-Keynesian equilibrium-selection rules if you want. This isn't really about fiscal theory; the key is rational forward-looking expectations in the first equation, which also hold in the standard sticky-price extensions. This "Fisherian" property is a common though widely ignored prediction of most new-Keynesian models. 

It certainly seems plausible that we are seeing an inflationary fiscal shock, from trillions of money printed up and sent to consumers, while interest rates stay fixed. These models predict that such inflation will indeed be transitory if the Fed does not raise interest rates, and will rise if it does!  

However, like all lower-rates-to-lower-inflation arguments, there are lots of warnings here. In particular, the "transitory" inflation could last a long time once we put in sticky prices. The trick only works if the Fed is completely committed to not raising rates, to waiting as long as it takes for inflation to settle back down on its own.  If people suspect the Fed will raise rates, inflation rises. There are lots of temporary forces that go in the other direction. And there may be more fiscal shocks -- I sort of see one brewing in Congress -- so we may not be done with the unexpected inflation term. 

FTPL section 5.3 has a long discussion of all the preconditions for lower interest rates to bring down inflation, which still obtain. But we haven't been talking about this issue much since the low-inflation zero-bound era ended, and the discussion that maybe determined, permanent, pre-announced interest rate rises could eventually bring up inflation. The opposite sign works as well. 

In these models, with a few more ingredients than I show above, the Fed can also lower inflation by raising rates. Raising rates gives a temporary inflation decline before going the other way. So, the Fed has to raise rates, push inflation down, then quickly get on the other side. That's the historical pattern, and what it will likely do.  But it's only honest, and fun, to remember the prediction of the opposite possibility and to think about how it might work out. 

******

Update. A second try, with more English. The government, Fed and Treasury, basically printed up about $5 trillion of new cash and treasury debt -- these are largely perfect substitutes so the composition doesn't really matter -- with no change at all in plans to repay debt. By simple FTPL, a 25% increase in debt with no increase in expected future surpluses generates a 25% rise in the price level, 25% cumulative inflation. It basically defaults on outstanding debt and transfers that value to the recipients of stimulus. 

But then it ends. If there is no more issue of nominal debt, without additional surpluses, then there is no more inflation. 

Additional issues of nominal debt can come from more unbacked fiscal expansion, or it can come from monetary policy. Monetary policy also puts extra government debt (same thing as interest-paying reserves) out there, with (of course) no change in fiscal policy. 

So there is the FTPL case for "transitory."In the long run, no change in interest rate puts no extra government debt in the system, and higher nominal interest rates must mean eventually higher inflation and hence more unbacked government debt in the system. 

 

Interest rate survey

Torsten Slok passed on a lovely graph, created from the Philadelphia Fed survey of professional forecasters: 

It's not just the Fed, whose own forecasts and dot plots have the same characteristics. 

Some potential lessons

1) Just you wait. There is the story of the hypochondriac, who when he died at 92 had inscribed on his tombstone "See, I told you I was sick." More serious stories have been told of the 1980s high interest rates, worried for a decade about inflation that could have come but never did. Or the famous "Peso problem," persistently low forward rates that eventually proved to be right. 

2) A lot of fun is made in survey research about the "irrational" expectations revealed by surveys. Whether "professionals" are involved is often a used to select between "rational" and "noise" investors in asset pricing studies. Hello, the professionals are just as behavioral as the rest of us. As are the Fed economists whose forecasts look the same. The argument from irrational-looking surveys to let the "experts" run and nudge things never did hold water. 

3) Just what do survey forecasts mean? How many of these Wall Street economists, or their trading desks are heavily short 10 year bonds? How many of them lost money on that trade for 20 years running? It's a good bet the same economists work for firms that, to the contrary, have been riding this... well, call it a trend, call it a bubble, call it a golden two decades for long-term bonds. What is the risk premium story for believing long term bonds are about to take a bath, but buying a lot of them anyway? 

4) Just what do survey forecasts mean? We ask people "what do you expect," and scratch our heads that they do not reply with numbers that make sense as true-measure conditional means. The event of a sharp raise in rates might come with substantially higher marginal utility, i.e. a very bad event. Reporting risk-neutral measure, probability times marginal utility might make sense for many reasons. Reporting a 40% quantile, shaded to bad news, makes a lot of sense for many reasons. Clients who make money don't complain. Clients who lose money do.  

5) Just what do survey forecasts mean?  For most surveys, the interesting thing is not the average but the astounding variation around that average. In theory, asset trading should lead to common expectations. In fact it does not. I would love to see the variation around this mean forecast. 

Confessions. I've been ... well, not forecasting, but doom and glooming about a sharp interest rate rise for just as long. And, I have to report, the graph has not yet changed my mind. To some extent, one faces the problem of the value investor, who every time the stock goes down has to say, "now it's an even better deal!" I guess I have company.  See, I told you I was sick? 

Ip on Bidenomics

Greg Ip has a great column in the WSJ on Bidenomics.  It's not long, it's so well written that it's hard to condense the good parts, and you should really read it all. 

There is an intellectual framework to Bidenomics, and with that a scarily more durable move on economic policy. 

There used to be 

"certain rules about how the world worked: governments should avoid deficits, liberalize trade and trust in markets. Taxes and social programs shouldn’t discourage work."

By contrast President Biden's (really his team's) "embrace of bigger government" is founded on different economic ideas. To wit, abridged: 

Growth

Old view: Scarcity is the default condition of economies: the demand for goods, services, labor and capital is limitless, their supply is limited. ...faster growth requires raising potential by increasing incentives to work and invest. Macroeconomic tools—monetary and fiscal policy—are only occasionally needed to deal with recessions and inflation.

New view: Slack is the default condition of economies. Growth is held back not by supply but chronic lack of demand, calling for continuously stimulative fiscal and monetary policy. J.W. Mason.. said, that “‘depression economics’ applies basically all of the time.”

I guess I'm an old fogie. 

Inflation outlook at NRO. 1970s all over again?

Essay on monetary policy in National Review Online. 

Short version: The Fed's monetary policy has returned to the intellectual framework of the late 1960s. At best "expectations" now float around as an independent force, manipulable by speeches, but not tied to patterns of action by the Fed as analysis since the 1980s would require. 

If you follow the conventional reading of how monetary policy works, that observation leads to a natural prediction:  we're on the verge of reliving 1970s inflation. (Fiscal policy, entitlements, regulation and cities seem to be headed also to 1970s policy on steroids.) 

True, the Fed says "we have the tools" to stop inflation should it break out. But that tool is to rerun 1980. Does the Fed have the will? Will the Fed really induce a 2 year agonizing recession to bring down inflation, followed by 15 years of historically unprecedented high interest rates? Or will the Fed do what it did three times before that -- half-hearted interest rate rises that brought milder recessions, and a quick backtrack? Having even a nuclear weapon is useless if people stop believing you will use it. 

I don't follow that conventional reading, so I'm not confidently predicting inflation. I worry more about fiscal affairs directly than about the Fed, which leads to a fear of a larger but less predictable inflation, that the Fed will have little power to stop. But mine is definitely a minority view.   

Does the Fed’s Monetary Policy Threaten Inflation? (Contains Spoilers)

The central bank is headed back to the Seventies — a rerun that no one should want.

Does the Fed’s monetary policy threaten inflation? By conventional measures, yes. But those conventional measures have failed in the past. I believe that the short-run danger is less than it appears, but the long-run danger is larger.

If one reads Fed statements through conventional glasses, monetary policy seems to have been reset to the 1960s, and we know how that worked out.

Magical monetary theory full review

I read Stephanie Kelton's book, The Deficit Myth: Modern Monetary Theory and the Birth of the People’s Economy,” and wrote this review for the Wall Street Journal. Now that 30 days have passed I can post the whole thing. 

I approached this task with an open mind. What I had heard of MMT has some overlap with fiscal theory of the price level, on which I work, and I hoped to see some commonality.

I was disappointed.

The review:

Modern monetary theory, known as MMT, erupted suddenly into the public consciousness when it won the attention of high-profile politicians including Bernie Sanders and Alexandria Ocasio-Cortez and their media admirers. Its central proposition states that the U.S. federal government can and should freely print money to finance a massive spending agenda, with no concern about debt and deficits.

What is MMT? Its advocates have told us in essays, blog posts, videos and tweets what MMT says about this and that, but what is its logic and evidence? As a monetary theorist who is also skeptical of conventional wisdom, I looked forward to a definitive exposition from Stephanie Kelton’s “The Deficit Myth: Modern Monetary Theory and the Birth of the People’s Economy.”

Ms. Kelton, a professor of economics at Stony Brook University and senior economic adviser to Bernie Sanders’s presidential campaign, starts with a few correct observations. But when the implications don’t lead to her desired conclusions, her logic, facts and language turn into pretzels.

True, the federal government can spend any amount by simply printing up the needed money (in reality, creating bank reserves). True, our government need never default since it can always print dollars to repay Treasury bonds. But if the government prints up and spends, say, $10 trillion, will that not lead to inflation? Ms. Kelton acknowledges the possibility: “If the government tries to spend too much in an economy that’s already running at full speed, inflation will accelerate.”

So how do we determine if the economy is running at full speed, or full of “slack,” with unemployed people and idle businesses that extra money might put to work without inflation? Ms. Kelton disdains the Federal Reserve’s noninflationary or “natural” unemployment rate measure of slack as a “doctrine that relies on human suffering to fight inflation.” Even the recent 3.5% unemployment is heartlessly too high for her.

“MMT urges us to think of slack more broadly.” OK, but how? She offers only one vaguely concrete suggestion: When evaluating spending bills, “careful analysis of the economy’s . . . slack would guide lawmakers. . . . If the CBO [Congressional Budget Office] and other independent analysts concluded it would risk pushing inflation above some desired inflation rate, then lawmakers could begin to assemble a venue of options to identify the most effective ways to mitigate that risk.” She doesn’t otherwise define slack or even offer a conceptual basis for its measurement. She just supposes that the CBO will somehow figure it out. She doesn't mention that the CBO now calculates a measure, potential GDP, which does not reveal perpetual slack. And she later excoriates the CBO for its deficit hawkishness.

Really her answer is: Don’t worry about it. She simply asserts that “there is always slack in the form of unemployed resources, including labor.”

We’re not talking about a little slack either. Ms. Kelton’s “people’s economy” starts with the full Green New Deal and moves on to a federal job for anyone, free health care, free child care, the immediate cancelation of student debt, free college, “affordable housing for all our people,” national high-speed rail, “expanded Social Security,” “a more robust public retirement system,” “middle-class tax cuts,” and more. How much does this add up to? $20 trillion? $50 trillion? She offers no numbers. How is it vaguely plausible that the U.S. has this much productive capacity lying around going to waste?

In a book about money, the inflation of the 1970s and its defeat are astonishingly absent. History starts with Franklin Roosevelt—a hero for enacting the New Deal but a villain for paying for it with payroll taxes rather than fresh dollars. Ms. Kelton praises John F. Kennedy, too. He “pressured unions and private industry, urging them to keep wage and price increases to a minimum to avoid driving inflation higher. It worked. The economy grew, unemployment fell sharply and inflation remained below 1.5 percent for the first half of the decade.”

The second half of that decade—Lyndon Johnson’s Great Society and Vietnam War spending, inflation’s breakout, Richard Nixon’s [1971] disastrous price controls—is AWOL. Did we not try MMT once and see the inflation? Did not every committee of worthies always see slack in the economy? Did not the 1970s see stagflation, refuting Ms. Kelton’s assertion that inflation comes only when there is no “slack”? Don’t look for answers in “The Deficit Myth.”

Victory over inflation under Ronald Reagan and Margaret Thatcher goes likewise unmentioned. History starts up again when Ms. Kelton excoriates Thatcher for saying that government spending has to be paid for with taxes. She insinuates, outrageously, that Thatcher deliberately lied on this point in order to “discourage the British people from demanding more from their government.”

If spending can be financed by printing money, “why not eliminate taxes altogether?” Ms. Kelton begins consistently. She criticizes Sens. Bernie Sanders and Elizabeth Warren for claiming that they need to raise taxes to pay for spending programs. But then why raise taxes? Taxes exist to decapitate the wealthy, not to fund spending or transfers: “We should tax billionaires to rebalance the distribution of wealth and income and to protect the health of our democracy.”

She offers a second answer, more subtle, and revealingly wrong. She starts well: “Taxes are there to create a demand for government currency.” This is a deep truth, which goes back to Adam Smith. Soaking up extra money with fiscal surpluses [higher taxes or less spending] is, in fact, the ultimate control over inflation. But then arithmetic fails her. To avoid inflation, all the new money must eventually be soaked up in taxes. The new spending, then, is ultimately paid for with those taxes.

What about the debt? Ms. Kelton asserts the government can wipe it out. Again, she starts correctly: The Fed could purchase all of the debt in return for newly created reserves. She continues correctly: The Fed could stop paying interest on reserves. But in conventional thinking, these steps would result in a swift inflation that is equivalent to default. Ms. Kelton asserts instead that these steps “would tend to push prices lower, not higher.” She reasons that not paying interest would reduce bondholders’ income and hence their spending.

 The mistake is easy to spot: People value government debt and reserves as an asset, in a portfolio. If the government stops paying interest, people try to dump the debt in favor of assets that pay a return and to buy goods and services, driving up prices.

What about all the countries that have suffered inflation, devaluation and debt crises even though they print their own currencies? To Ms. Kelton, developing nations suffer a “deficit” of “monetary sovereignty” because they “rely on imports to meet vital social needs,” which requires foreign currency. Why not earn that currency by exporting other goods and services? “Export-led growth . . . rarely succeeds.” China? Japan? Taiwan? South Korea? Her goal posts for “success” must lie far down field.

The problem is that “the rest of the world refuses to accept the currencies of developing countries in payment for crucial imports.” Darn right we do. Her solution: more printed money from Uncle Sam—a “global job guarantee.”

She also advises small and poor countries to cut themselves off from international commerce. They should develop “efficient hydroponic and aquaponics food production” and install “solar and wind farms” rather than import cheap food and oil. They should refuse international investment, with the “classical form of capital controls” under Bretton Woods as an ideal. “We share only one planet,” she writes, yet apparently that planet must have hard national borders.

By weight, however, most of the book is not about monetary theory. It’s rather a recitation of every perceived problem in America: the “good jobs deficit,” the “savings deficit,” the “health-care deficit,” the “infrastructure deficit,” the “democracy deficit” and—of course —the “climate deficit.” None of this is original or relevant. The desire to spend is not evidence of its feasibility.

Much of “The Deficit Myth” is a memoir of Ms. Kelton’s conversion to MMT beliefs and of her time in the hallways of power. She criticizes Democrats, including President Obama and his all-star economic team, for their thick skulls or their timidity to state her truth in public. Republicans, such as former House Speaker Paul Ryan, are just motivated by dark desires to keep the people down and enrich big corporations and wealthy fat cats. President Trump’s tax cuts are a “crime.” How insightful.

In a revealing moment, Ms. Kelton admits that “MMT can be used to defend policies that are traditionally more liberal . . . or more conservative (e.g., military spending or corporate tax cuts).” Well, if so, why fill a book on monetary theory with far-left wish lists? Why insult and annoy any reader to the right of Bernie Sanders’s left pinkie?

Writing the book to “defend” an immense left-wing spending agenda destroys her argument. If you could only feel her singular empathy for the downtrodden, if you could, as she does, view the federal budget as a “moral document,” if you could just close your eyes and need it to be true as much as she does, your “Copernican moment” will arrive, and logic and evidence will no longer trouble you.

That effect is compounded by her refusal to abide by the conventional norms of economic and public-policy discourse. She cites no articles in major peer-reviewed journals, monographs with explicit models and evidence, or any of the other trappings of economic discourse. The rest of us read and compare ideas. Ms. Kelton does not grapple with the vast and deep economic thinking since the 1940s on money, inflation, debts, stimulus and slack measurement. Each item on Ms. Kelton’s well-worn spending wish list has raised many obvious objections. She mentions none.

Skeptics have called it “magical monetary theory.” They’re right.

****

Update. To "jabmorris" and "rob." How could you possibly know if I have or have not read the book? As a matter of fact, I read every word of it. You offer a false accusation of impropriety, that you could not possibly know anything about, instead of a shred of fact or logic. This seems about par for the course in MMT land.

Summers tweet stream on secular stagnation

Larry Summers has an interesting tweet stream (HT Marginal Revolution) on the state of monetary policy. Much I agree with and find insightful:

Can central banking as we know it be the primary tool of macroeconomic stabilization in the industrial world over the next decade?...There is little room for interest rate cuts..QE and forward guidance have been tried on a substantial scale....It is hard to believe that changing adverbs here and there or altering the timing of press conferences or the mode of presenting projections is consequential...interest rates stuck at zero with no real prospect of escape - is now the confident market expectation in Europe & Japan, with essentially zero or negative yields over a generation....The one thing that was taught as axiomatic to economics students around the world was that monetary authorities could over the long term create as much inflation as they wanted through monetary policy. This proposition is now very much in doubt.

Agreed so far, and well put. "Monetary policy" here means buying government bonds and issuing reserves in return, or lowering short-term interest rates. I am still intrigued by the possibility that a commitment to permanently higher rates might raise inflation, but that's quite speculative.

and later

Limited nominal GDP growth in the face of very low interest rates has been interpreted as evidence simply that the neutral rate has fallen substantially....We believe it is at least equally plausible that the impact of interest rates on aggregate demand has declined sharply, and that the marginal impact falls off as rates fall.  It is even plausible that in some cases interest rate cuts may reduce aggregate demand: because of target saving behavior, reversal rate effects on fin. intermediaries, option effects on irreversible investment, and the arithmetic effect of lower rates on gov’t deficits

Central banks are a lot less powerful than everyone seems to think, and potentially for deep reasons. File this as speculative but very interesting. Larry has many thoughts on why lowering interest rates may be ineffective or unwise.

The question is just how bad this is? The economy is growing, unemployment is at an all time low, inflation is nonexistent, the dollar is strong. Larry and I grew up in the 1970s, and monetary affairs can be a lot worse.

Yes, the worry is how much the Fed can "stimulate" in the next recession. But it is not obvious to me that recessions come from somewhere else and are much mitigated by lowering short term rates as "stimulus." Many postwar recessions were induced by the Fed, and the Great Depression was made much worse by the Fed. Perhaps it is enough for the Fed simply not to screw up -- do its supervisory job of enforcing capital standards in booms (please, at last!) do its lender of last resort job in financial crises, and don't make matters worse.

But how bad is it now? Here Larry and I part company. Larry is, surprisingly to me, still pushing "secular stagnation"

Call it the black hole problem, secular stagnation, or Japanification, this set of issues should be what central banks are worrying about...We have come to agree w/ the point long stressed by Post Keynesian economists & recently emphasized by Palley that the role of specific frictions in economic fluctuations should be de-emphasized relative to a more fundamental lack of aggregate demand. 

The right issue for macroeconomists to be focused on is assuring adequate aggregate demand.  

My jaw drops.

The unemployment rate is 3.9%, lower than it has ever been in a half century. It fell faster after about 2014 than in the last two recessions.

Labor force participation is trending back up.

Wages are rising faster and faster, especially for less skilled and education educated workers.

 There are 8 million job openings in the US.

Why in the world are we talking about "lack of demand?