At What Time Scale, If Any, Does the Long Run Come?

Paul Krugman: Is The Economy Self-Correcting?: “Brad DeLong… has this wrong…

…The proposition of a long-run tendency toward full employment isn’t a primitive axiom in IS-LM. It’s derived… under certain assumptions… [with] good reason to believe that even under ‘normal’ conditions it’s… very weak…. And under liquidity-trap conditions it’s not a process we expect to see operate at all….

Blanchard, Cerutti and Summers… find… a half-life for output gaps of around 6 years. [In] the long run… we might not all be dead, but most of us will be hitting mandatory retirement…. [And] at the zero lower bound the process doesn’t work… [but] bring[s] on a debt-deflation spiral. Yes, a sufficiently large price fall could bring about expectations of future inflation–but that’s not the droid we’re looking for mechanism we’re talking about here…. Slumps usually don’t last all that long… [because] central banks… push back…. The economy isn’t self-correcting… [but] relies on Uncle Alan, or Uncle Ben, or Aunt Janet to get back to full employment. Which brings us back to the liquidity trap, in which the central bank loses most if not all of its traction…

But, I say, Uncle Ben did try to come to the rescue!:

Graph St Louis Adjusted Monetary Base FRED St Louis Fed
  • A doubling of the monetary base…
  • Followed by the 20% increase in the monetary base that was QE I…
  • Followed by the 30% increase in the monetary base that was QE II…
  • Followed by the 50% increase in the monetary base that was QE III…

These are big increases. If you think that only 1/10 of quantitative easing will permanently stick, that’s a 36% rise in the long-run money stock and thus the long-run price level. If you think that only 1/25 of quantitative easing will permanently stick, that’s a 15% increase in the long-run price level.

It is true that some of us thought that Uncle Ben should go double again after QE III–that he should push the monetary base up from $4 trillion to $8 trillion to see what happens. But Ben’s decision to call a halt to base-expansion was not clearly wrong, given the limited benefits and the unknown unknowns associated with such derangement of the structure of asset duration, after a 360% increase in the monetary base.

Paul will say that this is what his “in the liquidity trap… the central bank loses most if not all of its traction…” means. And Paul Krugman is (surprise! surprise!) right. To lose that much traction, however? To have the default assumption be that none of quantitative easing is going to stick for the long run, whenever the long run comes?

The failure of the full-employment long run to come “soon” once extraordinary quantitative easing was on the policy menu may not have surprised Paul. It certainly has surprised me…

Must-Read: Paul Krugman: Demand, Supply, and Macroeconomic Models

Paul Krugman talks to journalists during a news conference. (AP Photo/Francisco Seco)

Must-Read: A key factor Krugman omits in which standard Hicksian-inclined economists’ predictions have fallen down: the length of the short run. The length of the short run was supposed to be a small multiple of typical contract duration in the economy–perhaps six years in an economy characterized by three-year labor contracts, and perhaps three years in an economy in which workers and employers made decisions on an annual cycle. After that time, nominal prices and wages were supposed to have adjusted enough to nominal aggregates that the economy either would be at or would be well on the road to its long-run full-employment configuration. Moreover, the fact that price inertia was of limited duration combined with forward-looking financial markets and investment-profitability decisions to greatly damp short-run shortfalls of employment and production from full employment and sustainable potential.

It sounded good in theory. It has not proved true in reality since 2007:

Paul Krugman: Demand, Supply, and Macroeconomic Models: “If you came into the crisis with a broadly Hicksian view of aggregate demand…

…you did quite well… [arguing] that as long as we were at the zero lower bound massive increases in the monetary base wouldn’t be inflationary [and would have near-zero effects on broader aggregates]… budget deficits would not drive up interest rates… large multipliers from fiscal policy…. What hasn’t worked nearly as well is our understanding of aggregate supply… the absence of deflation… [of] the “clockwise spirals”… in inflation-unemployment space as evidence for… Friedman-Phelps…. The other big problem is the dramatic drop in… potential output… correlated with the depth of cyclical slumps….

[The] policy moral[?]… Central banks focused on stable inflation may think they’re doing a good job… when they are actually failing…. Fiscal contraction in a liquidity trap seems… absolutely terrible for the long-run as well as the short-run, and quite possibly counterproductive even in purely [debt burden] terms…. I don’t think even Hicksian-inclined economists have taken all of this sufficiently into account.

Weekend Reading: Paul Krugman (1997): Capitalism’s Mysterious Triumph

Paul Krugman delivers a speech at the Kiel Institute for the World Economy, Sunday, June 20, 2010. (AP Photo/Heribert Proepper)

Paul Krugman (1997): Capitalism’s Mysterious Triumph: “SYNOPSIS: Communism failed because of an inability to provide a sustaining reason for existence; only under crisis could it work.

Recently my local public television station has been showing a fascinating series entitled ‘Russia’s War’ – a history, produced in Russia, of the Soviet Union’s struggle in World War II. It is not a pretty story: the producers do not hesitate to tell the full story of Stalin’s brutality, and they do not try to mask the ugliness of war with patriotic romanticism. Yet this stark honesty in a way makes the account of the Soviet Union’s wartime achievement all the more impressive.

The Soviet Union did not win through military genius: most of its trained officers had been purged in political witch-hunts, and while the war eventually threw up a new set of leaders, they were competent rather than brilliant – and their advice was often overruled by a dictator whose military judgement was usually disastrous. Russian soldiers fought with dogged heroism – but then so did the Germans. Why did the Russians prevail?

The answer is surprising, given the way the 20th century has actually turned out. The Soviet triumph in World War II was, above all, a victory of production. Despite huge losses in the first months of the war, despite mass dislocations of population and the German occupation of many of the country’s key manufacturing centers, Soviet industry managed to build tanks, artillery, and aircraft that were technologically a match for Germany’s weapons, and to do so at a rate that consistently exceeded anything their opponents thought was possible. Indeed, the decisive German defeats at Stalingrad and Kursk came about precisely because the Germans launched offensives against what they imagined to be a weaker opponent, and were taken by surprise when counterattacked by thousands of tanks whose existence they had never suspected.

What does this have to do with the world of 1997? Well, nowadays we take the triumph of capitalism as something preordained by the superiority of our economic system. After all, it now seems obvious to everyone except North Korea and Cuba that a market economy is vastly more productive than one controlled from the center – and the Cuban economy is imploding, while the North Koreans are quite literally starving to death.

Moreover, every time a Communist regime collapses, it turns out that the actual state of the economy it governed was far worse than anyone had imagined. For example, typical estimates of the GDP of East Germany before the old regime collapsed put its real GDP per capita at 70 or 80 percent of the West German level – meaning that East Germany was actually richer than some regions in the West. Yet after the fall of the Berlin Wall, visiting Westerners found something that looked like a Third World economy, with antiquated factories (and disastrous environmental problems) producing consumer goods of ludicrously low quality (like the notorious East German Trabant, an automobile that makes a Honda or Ford seem like a Mercedes). We used to think that the Soviet Union had an economy about half as large as America’s, that is, bigger than Japan’s; nowadays Russia seems to have less economic power than, say, Italy. We used to think that there was a real technological race between socialism and capitalism; nowadays the symbol of Russian technology is the hapless Mir space station. It seems obvious to many people in retrospect that the productive and technological triumphs that Communists used to claim – all those heroic photgraphs of dams and posters of muscular steelworkers – were mere propaganda; in reality, we think we have learned, socialism is a system that just can’t deliver the goods, while capitalism is a system that can.

But one lesson of ‘Russia’s War’ is that matters are not that simple. Were the supposed productive triumphs of the Soviet Union under Stalin merely a hoax? Tell that to the soldiers of Germany’s Army Group Center – the few who survived. The fact is that Stalin did transform Russia into a massive industrial power – a power tested in the most unambiguous way imaginable. And his successors did achieve real technological triumphs – not just showy triumphs like sending cosmonauts into orbit, but the creation of a highly sophisticated scientific and engineering establishment. True, Russia was never any good at producing high-quality consumer goods. But it was not always the bumbling, incompetent system we now imagine.

What this means is that the collapse of Communism and the triumph of capitalism need more of an explanation than the stories we usually hear. It is not enough to explain all the reasons why a market economy is more efficient than a centrally planned one. Those explanations are basically right – but the question is why a system that functioned well enough to compete with capitalism in the 1940s and 50s fell apart in the 1980s. What went wrong?

One possible answer is that changing technology changed the rules. When the communist leader Joseph Dzhugashvili changed his name to Stalin – ‘man of steel’ – he reflected the times in which he lived, an era in which heavy industry ruled, in which giant steel plants were the symbol of progress.

These days, of course, steel-producing regions throughout the world – not just in the old Soviet Union – are depressed; try visiting southeastern Belgium.And it’s not just steel: the age when countries or companies grew rich by making heavy products in big factories seems to have passed. One can make a case that whereas old-fashioned heavy industry was susceptible to central planning, new technologies, especially in microelectronics, favor free-wheeling competition over centralized control.

Russia could at least appear to hold its own in a technological race defined by the ability to build giant rockets; it was left completely flatfooted when the West started putting powerful computers on a chip. In fact, in the last few years even Japan’s great corporations have started to look a bit like dinosaurs, lumbering helplessly in pursuit of the little startups of Silicon Valley.

Another possible answer is that capitalism triumphed because of ‘globalization’ – a process everyone talks about but which we really don’t fully understand. For some reason – perhaps some synergistic interaction among declining tariffs, cheaper transportation, and better communications – it has become possible in the last generation for many countries to industrialize rapidly, not through massive programs of government-led investment, but simply by throwing themselves open to the world market and letting events take their course. Socialist economies could not avail themselves of this new opportunity, and so they began to fall beind instead of catching up.

But neither technological change nor globalization can explain the fact that socialist economies did not merely lag the West: they actually went into decline, and then collapse. Why couldn’t they at least hold on to what they had?

I don’t think anyone really knows the answer, but let me make a conjecture: the basic problem was not technical, but moral. Communism failed as an economic system because people stopped believing in it, not the other way around.

A market system, of course, works whether people believe in it or not. You may dislike capitalism, even feel that as a system it will eventually fail, yet do your job well because your family needs the money you earn. Capitalism can run, even flourish, in a society of selfish cynics. But a non-market economy cannot. The personal incentives for workers to do their jobs well, for managers to make good decisions, are simply too weak.

In the later years of the Soviet Union, workers knew that they would be paid regardless of how hard they tried; managers knew that promotions would depend more on political connections than on performance; and nobody was offered rewards large enough to justify taking unpopular positions or any sort of serious risk. (There can’t have been more than a few dozen people in the Soviet Union – all of them politicians – who had the kind of lavish life style enjoyed by tens of thousands of successful entrepreneurs and executives in the United States). So why did the system ever work? Because people believed in it. I don’t mean that people went singing to their jobs, praising the motherland. I do mean that they did not take as much advantage of the system as they might have (and did, in the system’s later years). And I also mean that because people in authority believed in the system, they were willing to impose brutal punishments on those who did try to take advantage. (Stalin used to shoot unsuccessful generals).

We see this kind of thing all the time, in microcosm. The market does not require people to believe in it; but the centrally planned economies that live inside a market economy, known as corporations, do. Everybody knows that financial incentives alone are not enough to make a company succeed; it must also build morale, a sense of mission, which makes people work at least somewhat for the good of the company rather than think only of what is good for them. Luckily, under capitalism an individual company can fail without taking the whole society down with it – or it can be reformed without a bloody revolution.

Why did people stop believing in socialism? Part of the answer is simply the passage of time: you can’t expect revolutionary fervor to last for 70 years. But perhaps also the unexpected resurgence of capitalism played a role. By the 1980s Russia’s elite was all too aware that the country, instead of overtaking the capitalist nations, was slipping behind – that Russia was failing to take advantage of new technology, that if anyone was challenging the West it was the rising nations of Asia. Communism lost any claim to the mandate of history well before it actually fell apart, and perhaps that is why it fell apart.

In the end, then, capitalism triumphed because it is a system that is robust to cynicism, that assumes that each man is out for himself. For much of the past century and a half men have dreamed of something better, of an economy that drew on man’s better nature. But dreams, it turns out, can’t keep a system going over the long term; selfishness can.

What is the free-market solution to a liquidity trap? Higher inflation!

Three seventeen-year old quotes from Paul Krugman (Paul R. Krugman (1998): It’s Baaack: Japan’s Slump and the Return of the Liquidity Trap, Brookings Papers on Economic Activity 1998:2 (Fall), pp. 137-205):

Suppose that the required real rate of interest is negative; then the economy ‘needs’ inflation, and an attempt by the central bank to achieve price stability will lead to a zero nominal interest rate and excess cash holdings…

And:

In a flexible-price economy, the necessity of a negative real interest rate [for equilibrium] does not cause unemployment…. The economy deflates now in order to provide inflation later…. This fall in the price level occurs regardless of the current money supply, because any excess money will simply be hoarded, rather than added to spending…. The central bank- which finds itself presiding over inflation no matter what it does, [but] this [flexible-price version of the liquidity] trap has no adverse real consequences…

And:

A liquidity trap economy is “naturally” an economy with inflation; if prices were completely flexible, it would get that inflation regardless of monetary policy, so a deliberately inflationary policy is remedying a distortion rather than creating one…

Thinking about these three quotes has led me to change my rules for reading Paul Krugman.

My rules were, as you remember:

  1. Paul Krugman is right.
  2. If you think Paul Krugman is wrong, refer to (1).

They are now:

  1. Paul Krugman is right.
  2. If you think Paul Krugman is wrong, refer to (1).
  3. And even if you thought Paul Krugman was right already, go reread and study him more diligently–for he is right at a deeper and subtler level than you would think possible.

Let us imagine a fully-flexible distortion-free free-market economy–the utopia of the Randites. Let us consider how it would respond should people suddenly become more pessimistic about the future.

People feel poorer. Feeling poorer, people want to spend less now. However, today’s productive capacity has not fallen. Thus the market economy, in order to incentivize people to keep spending now at a rate high enough to maintain full employment, drops the real interest rate. It thus makes the future more expensive relative to the present, and makes it sufficiently more expensive to incentivize keeping real spending now high enough to maintain full employment.

The real interest rate has two parts. It is equal to:

  1. the nominal interest rate,
  2. minus the inflation rate.

If money demand in the economy is interest elastic, the fall in the real interest rate will take the form of adjustments in both pieces. First, the free-market flexible-price distortion-free economy’s equilibrium will shift to drop the nominal interest rate. Second, the equilibrium will also shift to drop price level will drop immediately and instantaneously. Then the subsequent rebound of the price level back to normal produces the inflation that is the other part of The adjustment of the real interest rate.

If money demand takes the peculiar form of a cash-in-advance constraint, then:

  1. the interest elasticity of money demand is zero as long as the interest-rate is positive, and then
  2. the interest elasticity of money demand is infinite when the interest-rate hits zero.

In this case, the process of adjustment of the real interest rate in response to bad news about the future has two stages. In the first stage, 100% of the fall in the real interest rate is carried by a fall in the nominal interest rate, as the price level stays put because the velocity of money remains constant at the maximum technologically-determined rate allowed by the cash-in-advance constraint. In the second stage, once the nominal interest rate hits zero, and there is no longer any market incentive to spend cash keeping velocity up, 100% of the remaining burden of adjustment rests on the expected rebound inflation produced by an immediate and instantaneous fall in the price level. These two stages together carry the real interest rate down to where it needs to be, in order to incentivize the right amount of spending to preserve full employment.

The free-market solution to the problem created by an outbreak of pessimism about the future is thus to drop the nominal interest rate and then, if that does not solve the problem, to generate enough inflation in order to solve the problem.

Now we do not have the free-market distortion-free flexible-price economy that is the utopia of the Randites. We have an economy with frictions and distortions, in which the job of the central bank is to get price signals governing behavior to values as close as possible to those that the free-market distortion-free flexible-price economy that is the utopia of the Randites would produce.

In particular, our economy has sticky prices in the short run. There can be no instantaneous drop in the price level to generate expectations of an actual rebound inflation. If the central bank confines its policies to simply reducing the nominal interest rate while attempting to hold its inflation target constant, it may fail to maintain full employment. Even with the nominal interest rate at zero, the fact that the price level is sticky in the short-run may mean that the real interest rate is still too high: there may still be insufficient incentive to get spending to the level needed to preserve full employment.

A confident central bank, however, would understand that its task is to compensate for the macroeconomic distortions and mimic the free-market flexible-price full-employment equilibrium outcome. It would understand that proper policy is to set out a path for the money stock and for the future price level that produces the decline in the real interest rates that the flexible-price market economy would have generated automatically.

Thus a confident central bank would view generating higher inflation in a liquidity trap not as imposing an extra distortion on the economy, but repairing one. The free-market flexible-price distortion-free economy of Randite utopia would generate inflation in a liquidity trap in order to maintain full employment–via this instantaneous and immediate initial drop in the price level. A central bank in a sticky price economy cannot generate this initial price-level drop. But it can do second-best by generating the inflation.

All of my points above are implicit–well, actually, more than implicit: they are explicit, albeit compressed–in Paul Krugman’s original 1998 liquidity trap paper.

And yet I did not come to full consciousness that they were explicit until I had, somewhat painfully, rethought them myself, and then picked up on them when I reread Krugman (1998).

On the one hand, I should not feel too bad: very few other economists have realized these points.

On the other hand, I should feel even worse: as best as I can determine, no North Atlantic central bankers have recognized these points laid out in Paul Krugman’s original 1998 liquidity trap paper.

Central bankers, instead, have regarded and do regard exceeding the previously-expected level of inflation as a policy defeat. No central bankers recognize it as a key piece of mimicking the free-market full-employment equilibrium response to a liquidity trap. None see it as an essential part of their performing the adjustment of intertemporal prices to equilibrium values that their flexible-price benchmark economy would automatically perform, and that they are supposed to undertake in making Say’s Law true in practice.

But why has this lesson not been absorbed by policymakers? It’s not as though Krugman (1998) is unknown, or rarely read, is it?

It amazes me how much of today’s macroeconomic debate is laid out explicitly–in compressed form, but explicitly–in Krugman’s (1998) paper and in the comments by Dominguez and Rogoff, especially Rogoff…

Must-Read: Paul Krugman: The Investment Accelerator and the Woes of the World

Must-Read: I must say, I want to go back to Larry Summers’s and my discussants for our 2012 paper, and ask them whether they want to amend their remarks, or whether they still stand by them.

Valerie Ramey: Do you still believe that any valid inferences can be made about long-run properties from AR models that match the first several autocorrelations? And do you still believe that the rate of long-run potential output growth is invariant to whether the short-run sees depression or boom?

Marty Feldstein: Do you still believe that a downturn like the one that began in 2008 is “cleansing” and leads potential output onto a higher growth path in the long run?

Paul Krugman: The Investment Accelerator and the Woes of the World: “Jason Furman… refuting the ‘Ma! He’s looking at me funny!’ school…

…which attributes US economic weakness to the way the Obama administration has created uncertainty, or hurt businessmen’s feelings, or something…. It’s a global slowdown, very much consistent with the ‘accelerator’ model, in which the level of investment demand depends on the rate of growth of overall demand…. If weak demand leads to lower investment, which it does, and if fiscal austerity is contractionary, which it is, then in a depressed economy deficit spending… crowds investment in…. Austerity policies [then] don’t release resources for private investment… [but] reduce future capacity in addition to causing present pain, [while] stimulus… supports, not hinders, long-run growth…

And let me say two further things to Jason Furman:

  1. Housing: the failure of the Obama administration to do anything to set the pattern of housing finance in stone may well be boosting uncertainty, and retarding investment in housing

  2. Investment and interest rates: If you are unhappy with a Federal Reserve that thinks that investment is growing too rapidly and needs to be cooled-off with interest rate increases, there is, on January 4, 2017, a recess of the Congress, during which recess appointments can be made.

Must-Read: Paul Krugman: Austerity’s Grim Legacy

Paul Krugman: Austerity’s Grim Legacy: “The consequences of the wrong turn we took look worse now…

…than the harshest critics of conventional wisdom ever imagined. For those who don’t remember (it’s hard to believe how long this has gone on): In 2010, more or less suddenly, the policy elite on both sides of the Atlantic decided to stop worrying about unemployment and start worrying about budget deficits instead. This shift wasn’t driven by evidence or careful analysis… was very much at odds with basic economics. Yet ominous talk about the dangers of deficits became something everyone said because everyone else was saying it… those parroting the orthodoxy of the moment [were the] Very Serious People. Some of us tried in vain to point out that deficit fetishism was both wrongheaded and destructive…. And we were vindicated by events. More than four and a half years have passed since Alan Simpson and Erskine Bowles warned of a fiscal crisis within two years; U.S. borrowing costs remain at historic lows. Meanwhile, the austerity policies that were put into place in 2010 and after had exactly the depressing effects textbook economics predicted; the confidence fairy never did put in an appearance…. [And] there’s growing evidence that we critics actually underestimated just how destructive the turn to austerity would be. Specifically, it now looks as if austerity policies didn’t just impose short-term losses of jobs and output, but they also crippled long-run growth….

At this point… evidence practically screams “hysteresis”. Even countries that seem to have largely recovered from the crisis, like the United States, are far poorer than precrisis projections suggested they would be at this point. And a new paper by Mr. Summers and Antonio Fatás… shows that the downgrading of nations’ long-run prospects is strongly correlated with the amount of austerity they imposed…. The turn to austerity had truly catastrophic effects…. The long-run damage suggested by the Fatás-Summers estimates is easily big enough to make austerity a self-defeating policy even in purely fiscal terms: Governments that slashed spending in the face of depression hurt their economies, and hence their future tax receipts, so much that even their debt will end up higher than it would have been without the cuts. And the bitter irony of the story is that this catastrophic policy was undertaken in the name of long-run responsibility….

There are a few obvious lessons… groupthink is no substitute for clear analysis… calling for sacrifice (by other people, of course) doesn’t mean you’re tough-minded. But will these lessons sink in? Past economic troubles, like the stagflation of the 1970s, led to widespread reconsideration of economic orthodoxy. But one striking aspect of the past few years has been how few people are willing to admit having been wrong about anything…

Intellectual Broker: (Trying to) Make Sense of Current (Small) Analytical Disagreements Between Paul Krugman and Larry Summers: Where Is the Can Opener?

Larry Summers tweets:

David Wessel picks it up:

And I attempt to Twittersplain, with how much success I do not know:

Larry Summers: Where Paul Krugman and I differ on secular stagnation and demand: “Paul Krugman suggests that I have had some kind of change of heart on secular stagnation…

…and converged towards his point of view…. I certainly appreciate the gravity of the secular stagnation issue more than I did…. But I think Paul exaggerates the change in my views considerably. The topic… was: ‘North America faces a Japan-style era of high unemployment and low growth.’ Paul argued in favor. I opposed the motion–not on the grounds that the US economy was in good shape, but on the grounds that our demand deficiency problems should be easier to solve than Japan’s… [because] it is dimensionally much less than the problems that Japan faced in four respects. Japan’s problems were different in magnitude, different in the depth of their structural roots, different in the… perspective… relative to the rest of the world… different in the degree of resilience [of] their system…. Paul responded in part by saying:

The question is, are we going to be stuck in a state of depressed demand of the kind that Larry has talked about. Larry and I agree that that is what has been happening… I think Larry and I agree almost entirely on the economics, on what needs to be done….

I think we have both been focused on demand and the liquidity trap for a long time. There are, though, two areas where I have had somewhat different views from Paul. I believe that structural issues are often important for demand and growth…. Second, I have never related well to Paul’s celebrated liquidity trap analysis. It has always seemed to me be a classic example of economists’ tendency to ‘assume a can opener’. Paul studies an economy in liquidity trap that will, by deus ex machina, be lifted out at some point in the future. He makes the point that if you assume sufficiently inflationary policy after this point, you can drive ex ante real rates down enough to stimulate the economy even before the deus ex machina moment.

This is true and an important insight. But it seems to elide the main issue. Where is the deus ex machina? Where is the can opener? The essence of the secular stagnation and hysteresis ideas that I have been pushing is that there is no assurance that capitalist economies, when plunged into downturn, will over any interval revert to what had been normal. Understanding this phenomenon and responding to it seems the central challenge for macroeconomics in this era. Any analysis that assumes restoration of previous equilibrium is, from this perspective, missing the main issue. I was glad to see Paul recognize this point recently.  I suspect it will lead to more emphasis on fiscal rather than monetary actions in depressed economies.

Paul Krugman: Liquidity Traps, Temporary and Permanent: “Larry Summers reacts to an offhand post of mine, seeking to draw a distinction between our views…

…I actually don’t think our views differ significantly now, but he’s right that what he has been saying differs from the approach I took way back in 1998. And I’ve both acknowledged that and admitted that the approach I took then seems inadequate now…. Japan now looks like an economy in which a negative natural rate is a more or less permanent condition. So, increasingly, does Europe. And the US may be in the same boat, if only because persistent weakness abroad will lead to a strong dollar, and we will end up importing demand weakness. And if we are in a world of secular stagnation–of more or less permanent negative natural rates–policy becomes even harder.

And I commented on Paul’s webpage thus: But, as I was tweeting to David Wessel, you scorn the Confidence Fairy while having some hope for the Inflation-Expectations Imp, while he scorns the Inflation-Expectations Imp but has some hope for the Confidence Fairy, no? And he has more hope for pump-priming small fiscal expansion to trigger virtuous circles and give the economy escape velocity, no? Small differences relative to those of the two of you vis-a-vis Rogoff, Mankiw, Feldstein, Bernanke, and, I think, even Blanchard. But differences, no?…

Must-Read: Paul Krugman: I do not think that word…<

Must-Read: When did the default definition of “expansionary fiscal policy” become not (1) “the government hires people to build a bridge”, but rather (2) “the government borrows money from some people and writes checks to others, thus raising both current financial assets and expected future tax liabilities”? Or, rather, for what communities did it become (2) rather than (1), and why?

Or, perhaps, when did the deficit become the off-the-shelf measure of the fiscal-policy stance, rather than some other measure that incorporated some role for the balanced-budget multiplier?

This is something I really ought to know, but do not. It is bad that I do not know this:

Paul Krugman: I do not think that word…: “…means what Tyler Cowen and Megan McArdle think it means…

…The word in question is ‘spending.’ Tyler’s latest on temporary versus permanent government consumption clarifies… the confusion…. By ‘government spending’… I mean the government actually, you know, buying something–say, building a bridge. When Tyler says

The Keynesian boost to aggregate demand arises because people consider the resulting bonds to be ‘net wealth’ even when they are not,

the only way that makes sense is if he’s thinking of a rebate check. If the government builds a bridge, the boost to aggregate demand comes not because people are ‘tricked’ into feeling wealthier, but because the government is building a bridge. The question then is how much of that direct increase in government demand is offset by a fall in private consumption because people expect their future taxes to be higher; obviously that offset is smaller if they think the bridge is a one-time expense than if they think there will be a bridge built every year. That’s why temporary government spending has a bigger effect…. I guess there’s an alternative theory of what Tyler is talking about–maybe he doesn’t consider the wages of the bridge-builders count, that only what they do with those wages matters…

Or, rather, that all government expenditure is wasteful, and you might have well have simply handed out checks rather than forced people to engage in pointless useless make-work.

What Kind of New Economic Thinking Is Needed Now?: A Twitter Dialogue, with References

A Twitter Dialogue: IS-LM and the Neoclassical Synthesis in the Short-Run and the Medium-Run: Andy Harless asks a question, and I try to explain what I think Paul Krugman is thinking…


And let me put the relevant Paul Krugman pieces down here below the fold… or, rather, below the second fold:

Paul Krugman (October 30, 2015): An Unteachable Moment: “It is, as Antonio Fatas notes, almost seven years since the Fed cut rates to zero…

…The era of lowflation-plus-liquidity-trap now rivals in length the 70s era of stagflation, and has been associated with much worse real economic performance. So where, asks Fatas, is the rethinking of economic theory and policy? I asked the same question a couple of years ago…. Some of us anticipated much though not all of what has gone wrong. [But as] Fatas says…

even those who agreed with this reading of the Japanese economy would have never thought that we would see the same thing happening in other advanced economies. Most thought that this was just a unique example of incompetence among Japanese policy makers….

I did write a 1999 book titled The Return of Depression Economics, basically warning that Japan might be a harbinger…. [But even] I never expected policy to be so bad that Japan ends up looking like a role model…. We should have expected… as major a rethink as… in the 70s… [but] we’ve seen almost no rethinking. Economists who wrote that ‘inflation is looming’ in 2009 continued to warn about looming inflation five years later. And that’s the professional economists. As Josh Barro notes, conservatives who imagine themselves intellectuals have increasingly turned to Austrian economics, which explicitly denies that empirical data need to be taken into account….

Back to Fatas: how long will it take before the long stagnation has the kind of intellectual impact that stagflation did… before people stop holding up the 1970s as the ultimate cautionary tale, even… in the midst of a continuing disaster that makes the 70s look mild? I don’t know…. It’s clear that we have to understand this phenomenon in terms of politics and sociology, not logic.

Paul Krugman (October 20, 2015): Rethinking Japan: “The IMF held a small roundtable discussion on Japan yesterday…

…and in preparation for the event I thought it was a good idea to update my discussion of Japan…. I find it useful to approach this subject by asking how I would change what I said in my 1998 paper on the liquidity trap… one of my best papers; and it has held up pretty well…. But… there are two crucial differences between then and now. First, the immediate economic problem is no longer one of boosting a depressed economy, but instead one of weaning the economy off fiscal support. Second, the problem confronting monetary policy is harder than it seemed, because demand weakness looks like an essentially permanent condition.

Back in 1998 Japan was in the midst of its lost decade… good reason to believe that it was operating far below potential output. This is… no longer the case…. Output per working-age adult has grown faster than in the United States since around 2000, and at this point the 25-year growth rates look similar (and Japan has done better than Europe)…. Japan [may be] closer to potential output than we are.

So if Japan isn’t deeply depressed at this point, why is low inflation/deflation a problem?The answer… is largely fiscal. Japan’s relatively healthy output and employment levels depend on continuing fiscal support… large budget deficits, which in a slow-growth economy means an ever-rising debt/GDP ratio. So far this hasn’t caused any problems…. But even those of us who believe that the risks of deficits have been wildly exaggerated would like to see the debt ratio stabilized and brought down at some point. And here’s the thing: under current conditions, with policy rates stuck at zero, Japan has no ability to offset the effects of fiscal retrenchment with monetary expansion.

The big reason to raise inflation, then, is to make it possible to cut real interest rates… allowing monetary policy to take over from fiscal policy…. The fact that real interest rates are in effect being kept too high by insufficient inflation at the zero lower bound also means that debt dynamics for any given budget deficit are worse than they should be…. Raising inflation would both make it possible to do fiscal adjustment and reduce the size of the adjustment needed.

But what would it take to raise inflation? Back in 1998… I envisaged an economy in which the current level of the Wicksellian natural rate of interest was negative, but that rate would return to a normal, positive level…. It was easy to show that this proposition applied only if the money increase was perceived as permanent, so that the liquidity trap became an expectations problem. The approach also suggested that monetary policy would be effective if… the central bank could ‘credibly promise to be irresponsible’…. But what is this future period of Wicksellian normality of which we speak?…

Japan looks like a country in which a negative Wicksellian rate is a more or less permanent condition. If that’s the reality, even a credible promise to be irresponsible might do nothing: if nobody believes that inflation will rise, it won’t. The only way to be at all sure of raising inflation is to accompany a changed monetary regime with a burst of fiscal stimulus…. While the goal of raising inflation is, in large part, to make space for fiscal consolidation, the first part of that strategy needs to involve fiscal expansion. This… is unconventional enough that one despairs of turning the argument into policy (a despair reinforced by yesterday’s meeting…)

How high should Japan set its inflation target?… High enough so that when it does engage in fiscal consolidation it can cut real interest rates far enough to maintain full utilization…. It’s really, really hard to believe that 2 percent inflation would be high enough…. Japan may face a version of the timidity trap. Suppose it convinces the public that it will really achieve 2 percent inflation… engages in fiscal consolidation, the economy slumps, and inflation falls well below 2 percent… the whole project unravels–and the damage to credibility makes it much harder to try again. What Japan needs (and the rest of us may well be following the same path) is really aggressive policy, using fiscal and monetary policy to boost inflation, and setting the target high enough that it’s sustainable. It needs to hit escape velocity. And while Abenomics has been a favorable surprise, it’s far from clear that it’s aggressive enough to get there.

Paul Krugman (March 21, 2014): Timid Analysis: IAn issue I’ve worried about for a long time…

…which I think I’ve been able to formulate a bit better. Here goes: If you look at the extensive theoretical literature on the zero lower bound since my 1998 paper, you find that just about all of it treats liquidity-trap conditions as the result of a temporary shock… [that] leads to a period of very low demand, so low that even zero interest rates aren’t enough to restore full employment. Eventually, however, the shock will end. So the way out is to convince the public that there has been a regime change, that the central bank will maintain expansionary monetary policy even after the economy recovers, so as to generate high demand and some inflation.

But if we’re talking about Japan, when exactly do we imagine that this period of high demand… is going to happen?… What does it take to credibly promise inflation? Well, it has to involve a strong element of self-fulfilling prophecy: people have to believe in higher inflation, which produces an economic boom, which yields the promised inflation. But a necessary (not sufficient) condition for this to work is that the promised inflation be high enough that it will indeed produce an economic boom if people believe the promise will be kept. If it isn’t, then the actual rate of inflation will fall short of the promise even if people believe in the promise–which means that they will stop believing after a while, and the whole effort will fail….

Suppose that the economy really needs a 4 percent inflation target, but the central bank says, ‘That seems kind of radical, so let’s be more cautious and only do 2 percent.’ This sounds prudent–but may actually guarantee failure.

Paul Krugman (March 20, 2014): The Timidity Trap: “In Europe… they’re crowing about Spain’s recovery…

…growth of 1 percent, versus 0.5 percent, in a deeply depressed economy with 55 percent youth unemployment. The fact that this can be considered good news just goes to show how accustomed we’ve grown to terrible economic conditions…. People seem increasingly to be accepting this miserable situation as the new normal…. How did this happen?… I’d argue that an important source of failure was what I’ve taken to calling the timidity trap–the consistent tendency of policy makers who have the right ideas in principle to go for half-measures in practice, and the way this timidity ends up backfiring, politically and even economically….

There are some important differences between the U.S. and European pain caucuses, but both now have truly impressive track records of being always wrong, never in doubt…. In America… a faction both on Wall Street and in Congress… has spent five years and more issuing lurid warnings about runaway inflation and soaring interest rates. You might think that the failure of any of these dire predictions to come true would inspire some second thoughts, but, after all these years, the same people are still being invited to testify, and are still saying the same things…. In Europe, four years have passed since the Continent turned to harsh austerity programs. The architects of these programs told us not to worry about adverse impacts on jobs and growth–the economic effects would be positive, because austerity would inspire confidence. Needless to say, the confidence fairy never appeared….

So what has been the response of the good guys?… The Obama administration’s heart–or, at any rate, its economic model–is in the right place. The Federal Reserve has pushed back against the springtime-for-Weimar, inflation-is-coming crowd. The International Monetary Fund has put out research debunking claims that austerity is painless. But these good guys never seem willing to go all-in…. The classic example is the Obama stimulus… obviously underpowered given the economy’s dire straits. That’s not 20/20 hindsight….

The Fed has, in its own way, done the same thing. From the start, monetary officials ruled out the kinds of monetary policies most likely to work–in particular, anything that might signal a willingness to tolerate somewhat higher inflation, at least temporarily. As a result, the policies they have followed have fallen short of hopes, and ended up leaving the impression that nothing much can be done.

And the same may be true even in Japan… finally adopting the kind of aggressive monetary stimulus Western economists have been urging for 15 years and more. Yet there’s still a diffidence… a tendency to set things like inflation targets lower than the situation really demands… [that] increases the risk that Japan will fail to achieve ‘liftoff’–that the boost it gets from the new policies won’t be enough to really break free from deflation.

You might ask why the good guys have been so timid, the bad guys so self-confident. I suspect that the answer has a lot to do with class interests. But that will have to be a subject for another column.

Secular Stagnation–That’s My Title, of the Longer Version at Least

J. Bradford DeLong: The Tragedy of Ben Bernanke: Project Syndicate:

Ben Bernanke has published his memoir, The Courage to Act.

I am finding it hard to read. And I am finding it hard to read as anything other than a tragedy. It is the story of a man who may have been the best-prepared person in the world for the job he was given, but who soon found himself outmatched by its challenges, quickly falling behind the curve and never quite managing to catch up.

It is to Bernanke’s great credit that the shock of 2007-2008 did not trigger another Great Depression. But the aftermath was unexpectedly disappointing… READ MOAR AT PROJECT SYNDICATE