Things to Read on the Afternoon of May 31, 2015

Must- and Should-Reads:

Might Like to Be Aware of:

Over at Project Syndicate: Putting Economic Models in Their Place

Over at Project Syndicate: Putting Economic Models in Their Place:

Among the voices calling these days for new–or at least substantially different–economic thinking http://ineteconomics.org is the very sharp Paul M. Romer http://paulromer.net/ of New York University, with his critique of what he calls “Mathiness” in modern economics http://paulromer.net/mathiness/. He seems, to me at least, to be very worried principally about two aspects of modern economic discourse. The first is to take what is true about one restricted class of theories and generalize it, claiming it is true of all theories and of the world as well. Romer’s prime example is Robert Lucas, in the claim:

Some knowledge can be ‘embodied’ in books, blueprints, machines, and other kinds of physical capital, and we know how to introduce capital into a growth model, but we also know that doing so does not by itself provide an engine of [permanently] sustained growth…

That is true in the theory–if and only if the growth model is set up so that the return on that kind of embodiment capital drops to zero eventually as capital accumulates. As Romer notes, there are models in which things are otherwise, including: those “with an expanding variety of capital goods or a ladder of capital goods of improving quality…” Thus what Lucas claims must be true about the world as a matter of correct theory–that the big secret to successful economic growth cannot lie in creating and acquiring the kind of knowledge that gets “’embodied’ in books, blueprints, machines…”–rests on the barely-examined decision to restrict attention to only a few kinds of models.

That restriction to examining implications of only a few classes of theories would not be so bad if the classes of theories examined were those that might be correct. Suppose the theories examined are those that model the salient and important aspects of individual decision-making and action, properly setup their strategic and non-strategic actions, and end up with a bestiary of visible aggregate-level patterns into which the economy might fall–what could be wrong with that? The problem comes with the second principal aspect of “mathiness”: to claim that one and only one mode of interaction and one and only one mode of individual decision-making is admissible at the foundation level of economic models. Here Romer attacks the assumption that the only allowable interaction is one of price-taking behavior: selling (or buying) as much as one wants at whatever the single fixed price currently offered by the market is. And here I would attack the assumption that individual decision-making is always characterized by rational expectations.

These might be adequate as foundations on which to build models that will fit and help us understand the world. But that is so only if and where we be lucky enough that market processes be structured exactly right. They must iron out at the macro level all the deviations from price-taking and rational expectations we see at the individual level. And as we look around, we see them everywhere. It is theoretically false to claim that market processes must be so structured. It is an empirical question as to whether, which, and when market processes are so structured.

Thus Paul Romer sees, in growth theory, the current generation of neoclassical economists grind out paper after paper imposing on the world “the restriction of 0 percent excludability of ideas required for [the] Marshallian external increasing returns” necessary for there to even be a price-taking equilibrium. And he judges–and I agree–that such papers are useless for any purpose other than advancing the writers in academic status games. And I see, in macroeconomics, paper after paper and banker after banker and industrialist after industrialist and technocrat after technocrat and politician after politician claiming that everything that governments might to to speed recovery must be counterproductive, or at least too risky–because that is what is in the case in a very restricted class of rational-expectations models.

This has now been going on for a long time: yesterday they crossed my desks critiques of expansionary fiscal and monetary policy made by Jacob Viner http://delong.typepad.com/viner-on-keynes.pdf and Étienne Mantoux http://classiques.uqac.ca/classiques/mantoux_etienne/theorie_generale_keynes/theorie_generale_keynes_texte.html in the 1930s–in the middle of the Great Depression!–claiming that such policies could only boost employment if they were accompanied by undesirable and unwarranted inflation, and would probably reduce production in the long run as well.

The depressing thing is that while academic economists in universities may be a little more willing to entertain the possibility that what is needed is a general theory rather than a classical price-taking rational-expectations theory, are the others? Are bankers and industrialists and technocrats and politicians?

Things to Read at Lunchtime on May 29, 2015

Must- and Should-Reads:

Might Like to Be Aware of:

Why Is the U.S. Economy Still Depressed?: The Arithmetic

NewImage

Arithmetically, the U.S. economy is depressed because residential construction and government purchases are well below previously-expected trend levels…

Back in 2007 those whose business it was to forecast the American economy were confidently projecting that, come 2015, nominal GDP–the total amount of spending in dollars on currently-produced and marketed goods and services in the United States, plus imputed rent on owner-occupied houses–would be $21.5 trillion. It will be about $18.3 trillion. Back in 2007 they were projecting that real GDP at 2009 prices would, in 2015, be $18 trillion. It will be $16.5 trillion. Back in 2007 they were forecasting that 87% of 25-54 year-old males would have jobs, not 84%. Back in 2007 they were forecasting that 72% of 25-54 year-old females would have jobs, not 70%.

Why? At the arithmetic level, it is because residential construction and government purchases have fallen far below their expected trends by a lot, consumption spending has fallen below its previousy-expected trend by a little, business investment is more-or-less at its previously-expected trend, and only exports have boomed relative to 2007 expectations.

Just because one component of spending falls off in relative terms does not mean that the economy must fall into depression. Take a look at the graph above over 2005-2008. The housing bubble bursts, housing prices collapse, and the pace of residential construction collapses–but exports and businesses pick up the slack. Why? Because money flows that would have gone to funding residential construction were switched to purchasing exports from America and were loaned to businesses that stepped up their pace of expanding their capital stocks instead. When an excess supply of finance emerges because one component of spending declines, the financial market and the Federal Reserve are supposed to guide interest rates down, thus signaling to other potential components of spending that finance is available and can be put to work.

But in 2008 this so-called “credit channel” collapsed as Wall Street in particular and American finance in general broke down. 2008-2009 saw all of business investment, residential construction, and exports–plus consumption spending–collapse, with only Obama’s feeble Recovery Act working in the other direction. And it was only large enough to offset one-eighth of the collapse in the other salient components of aggregate demand. Hence the deeply depressed economy of late 2009.

And since? Short-term safe interest rates have been at zero. Finance is still potentially available, but the Federal Reserve lacks the tools to guide the interest rates it controls below zero. And the private financial market is still too spooked to push risky interest rates down and asset prices up further relative to safe rates. So there is no economic signal available to make financing business equipment investment and consumption spending even cheaper and so inducing businesses and consumers to do enough of it to push the economy to full employment. The same is true of single-family residential construction (multi-family has recovered to normal).

And governments are not responding to market signals: financial markets are telling them that they have a once-in-a-lifetime opportunity to advantageously pull spending forward from the future into the present and push taxes back from the present into the future. But, because of the ideology of austerity, they are not taking advantage of this opportunity.

Austerity, Recovery, and Macroeconomic Analysis: In Which I Refuse to Write the Column the Honchos of Project Syndicate Wish Me To

Over at Grasping Reality:

Over on Twitter:

  • @ObsoleteDogma: Niall Ferguson, still a huge hack: http://www.project-syndicate.org/commentary/niall-ferguson-british-austerity-by-robert-skidelsky-2015-05
  • @delong: .@ObsoleteDogma will it brighten or darken my day if I read Skidelsky?
  • @splinterknight: @delong @ObsoleteDogma Hopefully brighten. And, @delong, it would be great if you jumped into the debate with your next @prosyn piece

  • @delong: .@splinterknight What debate? Back in 2007 we thought that austerity was probably a bad idea at the ZLB for economies without foreign-denominated debt, and with their own central banks, that could print reserve-currency assets. Everything since 2007 has strengthened confidence in that view. Nothing has weakened it. For such economies, at current interest rates, it is highly likely that money- and bond-financed infrastructure broadly defined, and likely that general government spending or tax reduction initiatives pay for themselves. Such economies should undertake them. Those that worry about interest-rate risk should borrow long and lock low rates in. Those with confidence in monetary control should do normal debt management. At the level of the ideas, there is nothing to debate. At the level of public discourse, there is nobody on the other side worth debating. Skidelsky has it right. Full stop. @ObsoleteDogma @ProSyn

  • @splinterknight: @delong This is exactly the column I’d love to read from you.
  • @splinterknight: fair enough

Refereeing Mantoux-Keynes on the Treaty of Versailles

Over at Grasping Reality: Note to Self: Rereading Etienne Mantoux: La Paix Calomniée, ou les Conséquences Économiques de M. Keynes. “The Calumniated Peace” of Versailles. OK. So why is the title of the English translation The Carthaginian Peace? Who decided to replace “Caluminiated” with “Carthaginian”, and why?

Recall that Etienne Mantoux’s review of Keynes’s General Theory is quite bad. At its beginning:

With his fascination Keynes combines another of the serpent’s attributes–his disconcerting ability to molt at more or less frequent intervals, leaving his former conceptions behind him like so many old integuments from which the reader, somewhat disconcerted, must extract himself, having previously been at no little trouble to get in…. We are to witness a revolution. At least so one would gather from some of the more enthusiastic reviews, which go so far as to make Keynes (much to his disgust no doubt) the direct successor of Karl Marx. “My undertaking is one that has no equal, that none will ever equal. I would change the basis of society, shift the axis of civilization…” Is that facetious to place Proudhon’s ironic boasts beside Keynes’ ambitious sureness? Yet their two proposals are not so very unlike, for it is by decline of the rate of interest to zero that the latter would see our economic ills remedied. Curious that the most sharp-tongued economist of our time should come back, by this unexpected route, to the thought of the famous inventor of “credit gratuit”…

And at its end:

Is not this policy likely to beget inflation pure and simple, and present us once more with the excesses that have characterized all great crises, and that were indulged in con molto brio during the last?… Cannot Keynes, who has so much interest in the history of ideas, boast today of having failed not only to predict, but even to persuade? On March 7, 1931, an article appeared that ended, for generations perhaps, an era begun by Adam Smith in 1776. Keynes had always wondered whether he was really a liberal…. For many liberals, attached to free trade as the last symbol of their convictions, his conversion must have been a real tragedy. But then as always, Keynes acted in the best of faith. Today he has come round to an esoteric justification of the preconceptions of the man in the street… [are] sounder than the classical economist’s…. After all this manifestation of candor, Keynes may be yielding to the temptations of his genius for mystification. When… he… pays belated homage to Silvio Gesell… J. A. Hobson… Major Douglas… quotes Mandeville… he certainly hopes to scandalize…. He still belongs… to the antipuritan and anti-Victorian tradition… [of] Wells and Shaw. But behind this foolery, do we not sense some discomfiture, after a long and painful effort of conscience in quest of truth forlorn–à la recherche de la vérité perdue?

In these two paragraphs, Mantoux manages to:

  1. Red-bait Keynes.
  2. Misrepresent Keynes’s Wicksellian solution to the problem of the business cycle–use monetary policy to match the market to the natural rate of interest so that Say’s Law is true at full employment in practice, if possible, and to use other government policies to more directly boost investment to full-employment levels of not–as if it was Proudhon’s demand for “credit gratuit”.
  3. Fail to understand that pretty much everything that had happened to the economies of western European in the decade before he wrote argued strongly against his belief that stimulative monetary and fiscal policies were always “likely to beget inflation pure and simple”, and that he had a good deal of rethinking to do.
  4. Misrepresent Keynes’s advocacy in 1931 of an employment-boosting tariff as a third-best given that expansionary fiscal policy was off the table because of worry of the high debt and expansionary monetary policy was off the table because of Britain’s commitment to the gold standard.
  5. Misrepresent Keynes’s attitude at the end of the General Theory: there is no discomfiture there to be sensed; rather it is a most triumphal assertion of ego, as Keynes tells all and sundry that he is certain that he has gotten it right and that it really matters.

Making my way through The Carthaginian Peace, I find it not much stronger than Mantoux’s review of the General Theory. Germany could have paid post-WWI reparations to France. Simply force the German government to tax, have it use its tax revenues to buy up shares of German capital, give the ownership shares to the French, have the French sell the shares back to Germans, and then have the French use the reichsmarks thus earned to buy imports from Germany. Allow the value of the franc to rise relative to gold and to the reichsmark so that France’s export industries wither and labor and capital are redirected to government-funded reconstruction work in northern France, and everything can work out. The problems, however are:

  • If you require not the franc to appreciate but the reichsmark to depreciate, it is likely that there is no equilibrium: the more goods and services Germany transfers, the deeper in reparations debt it finds itself.
  • If you require that France retain its export industries, there is once again no equilibrium.
  • If you believe that Stresemann, Rathenau, Ebert, and company are worth backing–that a stable, Democratic Weimar Germany is in everyone’s interest–than the game is simply not worth playing at all.

I do not think Keynes got the analytics and the politics completely correct writing in 1919. But I do think he got both the analytics and the politics much more correct writing in 1919 than Mantoux did writing during World War II.

Did Keynes ever respond to Mantoux? I believe not. Did he even know about it (them)? I cannot tell…

Research Questions: Money Incomes and Societal Well-Being

Over at Grasping Reality: Peter T. asks good research questions about the relationship between what people are paying for and what they are getting. Consider that the GDP contribution of Missouri’s payday loan industry is the collective interest payments of the borrowers. Consider that in Portland location premiums are for living in nice convenient places, while in Kansas City they are in large part for largely-illusory insulation from regional sociological and public finance problems:

Comment of the Day: Peter T.: Regional Economics and Living Standards: Portland OR vs. Kansas City MO/KS: “How much of the greater amount of money in Kansas City [relative to Portland]…

…is just money, as opposed to goods and services? How much is money generated by grifts (payday loans, student debt for courses with no prospect of employment, cancer cures peddled by Republican presidential wannabees…). How hard would it be to map the density of payday lenders in the US? Or to take a chunk of credit card data and work out where the desperate suckers are? How does these and similar indicators correlate to health, income, education? Where do the profits come from, and where do they go? Is anyone doing this?

Weekend reading

This is a weekly post we publish on Fridays with links to articles we think anyone interested in equitable growth should be reading. We won’t be the first to share these articles, but we hope by taking a look back at the whole week we can put them in context.

Links

Dylan Matthews writes up the big new report from the Roosevelt Institute about reducing economic rents and boosting economic growth. [vox]

Vipal Monga, David Benoit, and Theo Francis document the increased payouts to shareholders due to increased investor activism. [wsj]

Martin Wolf argues that finance is currently too much of a good thing. [ft]

The Federal Reserve Bank of Richmond interviews economist Claudia Goldin. [richmond fed]

Claire Cain Miller highlights some negative consequences of family-friendly policies. [the upshot]

Friday figure

Figure from “The future of work in the second machine age is up to us” by Marshall Steinbaum.

incomegrowth-quintile1

What to make of slow 1st quarter U.S. economic growth?

The U.S. Bureau of Economic Analysis today released its second estimate of gross domestic product growth in the first quarter of this year. Predictions of negative economic growth came true as GDP declined at a 0.7 percent annual rate during the first three months of 2015. What should we make of this report? With the caveat that discerning a pattern off of one report using one data series for one quarter can be risky, here are several options for what this report might signal about the current pace of U.S. economic growth.

The first is simply that there’s a flaw in the data. The data released to the general public is adjusted in several ways, including an adjustment to account for fluctuations that happen over the course of the year. Just one case in point: Sales go up during December every year due to holiday shopping so there’s a seasonal adjustment to account for ths regular patterns so we don’t think there’s an uptick in GDP growth every December. But given the pattern of weak growth in the first quarter over the last several years, many economists and analysts have become concerned there are flaws in the BEA’s seasonal adjustments. In a post at Bruegel, Jeremie Cohen-Setton of the University of California-Berkeley rounds up the various articles on this potential problem with the GDP data.

But what if the seasonal adjustment isn’t the issue? GDP growth was extremely weak during the first quarter, but with the exception of March employment growth doesn’t seem to have significantly shifted downward. So a second option is this—we probably aren’t experiencing a decline in overall economic activity. In other words, a recession doesn’t seem imminent.

Yet continued employment growth in the face of weak output growth would be a sign of a third option—low productivity growth. Grep Ip at The Wall Street Journal makes this case, paralleling the situation in the United States with conditions in Japan and Germany. Weak output growth in the first quarter, in this case, isn’t a sign of an imminent downturn but rather weaker potential long-run growth.

The fourth option: economic growth remains weak because a full recovery since the end of Great Recession in mid-2009 is still elusive. The overall unemployment may be hovering around the rate that some economists consider its natural rate of around 5 percent, yet the share of prime-age workers ages 25 to 54 with a job—at 77.2 percent—is still below its 2007 pre-recession high. GDP growth has been positive for a while, but by several estimates of GDP the decline reported today may be a sign of a recovery that’s not as strong as we’d like.

Of course, it’s possible that some mixture of all of these options is closer to the truth. That’s why we shouldn’t over-react to a decline in GDP. Instead, we should spend some time trying to consider why it happened at all.