Two items of interest are noted and quoted here.
First is an article by Robert Shiller who decries the failure of current economic models to address bubbles. Second is a blog posting by Brad DeLong of UC Berkley provides more in the running disputes between saltwater and freshwater economists. Paul Krugman is not the only one involved in this debate.
From Robert Shiller: Economists need to study bubbles,
reinvent models
http://www.taipeitimes.com/News/editorials/archives/2009/09/22/2003454141
By Robert Shiller
Tuesday, Sep 22, 2009, Page 9
The widespread failure of economists
to forecast the financial crisis that erupted last year has much to do with
faulty models. This lack of sound models meant that economic policymakers and
central bankers received no warning of what was to come.
As George Akerlof and I argue in our recent book
Animal Spirits, the current financial crisis was driven by speculative bubbles
in the housing market, the stock market, energy and other commodities markets.
Bubbles are caused by feedback loops: rising speculative prices encourage
optimism, which encourages more buying and hence further speculative price
increases — until the crash comes.
You won’t find the word “bubble,” however, in most economics treatises or
textbooks. Likewise, a search of working papers produced by central banks and
economics departments in recent years yields few instances of “bubbles” even
being mentioned. Indeed, the idea that bubbles exist has become so disreputable
in much of the economics and finance profession that bringing them up in an
economics seminar is like bringing up astrology to a group of astronomers.
THE REST OF THE ARTICLE CAN BE FOUND AT THE LINK ABOVE.
For Brad DeLong:
http://delong.typepad.com/sdj/2009/09/a-magnificent-seven.html
Shichinin
no Economusutai--NOT!!
David K. Levine of Washington
University in St. Louis:
"It is a daunting task to bring
you [Paul Krugman] up to date on the developments in economics in the last
quarter century. I know that John Cochrane has tried to educate you about what
we've learned about fiscal stimulae [sic][1] in that period..." and
"But the stimulus plan? How can you be arguing for more? Since we are
recovering before most of the stimulus money has entered the economy--isn't
that evidence it isn't needed? How can you write as if you are proven right in
supporting it?"
John Cochrane of the University of
Chicago:
"[That spending can spur the
economy] is not part of what anybody has taught graduate students since the
1960s. They are fairy tales that have been proved false. It is very comforting
in times of stress to go back to the fairy tales we heard as children but it
doesn’t make them less false..." and "Paul [Krugman's]’s Keynesian
economics requires that people make logically inconsistent plans to consume
more, invest more, and pay more taxes with the same income..."
Robert Lucas of the University of
Chicago:
"Christina Romer--here's what I
think happened. It's her first day on the job and somebody says, you've got to
come up with a solution to this--in defense of this fiscal stimulus, which no
one told her what it was going to be, and have it by Monday morning.... [I]t's
a very naked rationalization for policies that were already, you know, decided
on for other reasons..." and "If we do build the bridge by taking tax
money away from somebody else, and using that to pay the bridge builder--the
guys who work on the bridge -- then it's just a wash... there's nothing to
apply a multiplier to. (Laughs.) You apply a multiplier to the bridge builders,
then you've got to apply the same multiplier with a minus sign to the people
you taxed to build the bridge. And then taxing them later isn't going to help,
we know that..."
Edward Prescott of Arizona State University:
"I don't know why Obama said
all economists agree on [the need for a stimulus bill]. They don't. If you go
down to the third-tier schools, yes, but they're not the people advancing the
science..." and "the period of the '20s was one of healthy growth,
until Hoover's anti-market, anti-globalization, anti-immigration, pro-
cartelization policies were instituted, brought this expansion to an end, and
created a great depression..."
Eugene Fama of the University of
Chicago:
"Sorry, but I’m not familiar
with [Hyman] Minsky’s work" and "Haven't seen it [Paul Krugman's
article]. I pay no attention to him..." and "Government bailouts and
stimulus plans seem attractive when there are idle resources - unemployment.
Unfortunately, bailouts and stimulus plans are not a cure. The problem is
simple: bailouts and stimulus plans are funded by issuing more government debt.
(The money must come from somewhere!) The added debt absorbs savings that would
otherwise go to private investment. In the end, despite the existence of idle
resources, bailouts and stimulus plans do not add to current resources in use.
They just move resources from one use to another..."
Luigi Zingales of the University of
Chicago:
"Keynesianism has conquered the
hearts and minds of politicians and ordinary people alike because it provides a
theoretical justification for irresponsible behaviour. Medical science has
established that one or two glasses of wine per day are good for your long-term
health, but no doctor would recommend a recovering alcoholic to follow this
prescription. Unfortunately, Keynesian economists do exactly this. They tell
politicians, who are addicted to spending our money, that government
expenditures are good. And they tell consumers, who are affected by severe
spending problems, that consuming is good, while saving is bad. In medicine,
such behaviour would get you expelled from the medical profession; in
economics, it gives you a job in Washington..." and "Among the 37
Economics Nobel prize winners in the last 20 years, four received the prize for
their contributions to macroeconomics. None of these could be considered
Keynesian. In fact, it is hard to find academic papers supporting the idea of a
fiscal stimulus..."
Michele Boldrin of Washington
University in St. Louis:
"It is a fantasy that the
economic profession at large finds the "stimulus" and the "bank
bailout" plans sensible and adequate. Most economists we know oppose
them.... Outside the administration, the convinced supporters of the plans are
a small minority among academic economists working in those fields. Both plans
contradict four decades of research and are designed to please special interest
groups..." and "Is there a case for borrowing now to finance a
stimulus package? People are worried about the future and are sensibly reducing
their spending. Does this imply the government should step in and do the
spending for them? Put that way, the idea seems like a non-starter..."
In case there is any doubt:
- Paul Krugman is reasonably up-to-date on research in
macroeconomics over the past quarter century (Levine);
- that spending can spur the economy is part of what
everyone who teaches their graduate students about the dot-com boom of the
1990s or about the housing-led expansion of the 2000s says, and the
government's spending is as good as anyone else's as far as this is
concerned (Cochrane);
- Christina Romer played a significant role in the design
of the ARRA (Lucas);
- there is certainly debate over whether "advancing
the science" means what Ed Prescott thinks it means (Prescott);
- Eugene Fama really ought to have paid a little
attention to Minsky-Kindleberger at some point in his career (and really
ought to be paying attention to Krugman now) (Fama);
- Luigi Zingales needs really, really badly to read John
Maynard Keynes's "How to Pay for the War" before he embarrasses
himself further (Zingales); and
- I don't think "working in those fields means what
Michele Boldrin thinks that it means (Boldrin).
And in case there is any doubt:
- the fact that macroeconomic market failures are no
longer getting rapidly worse is not a reason for immediately abandoning
all of the policies to deal with thsoe failures (Levine);
- there is nothing logically inconsistent with models in
which aggregate planned expenditure is different from income, and indeed
Milton Friedman's, Knut Wicksell's, and David Hume's economic models are
all of this type (Cochrane);
- even full Ricardian equivalence does not keep changes
in government purchases from affecting total spending (unless government
purchases are perfect substitutes for private consumption) (Lucas);
- Herbert Hoover was on the right wing of the American
political spectrum and tried as best he could to follow pro-market, pro-globalization,
pro-competition economic policies (Prescott);
- the savings-investment identity is an equilibrium
condition, not a behavioral relationship. Thus it says nothing about how
and whether changes in one form of spending will or will not call forth
changes in the flow of spending as a whole (Fama);
- it is in fact rather easy to find academic papers
supporting the idea of fiscal stimulus under appropriate conditions, if
you look (Zingales); and
- when the prices of private bonds collapse and the prices
of government bonds soar, that is a very powerful market signal that
private businesses should borrow (and spend) less and the government
should borrow (and spend) more (Boldrin).
The scary thing is not that Levine,
Cochrane, Lucas, Prescott, Fama, Zingales, and Boldrin are wrong--people are
wrong all the time. The scary thing is the level at which they are
wrong: these are all freshman (ok, sophomore) mistakes--yet the seven include
two past (and a year ago I would have said three future Nobel laureates in
Economics).
If this doesn't frighten you, you
aren't paying attention...
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