Posts Tagged ‘Krugman’

Does Price Stability Entail Financial Stability?

May 4, 2015 3 comments

I reproduce here a post I wrote with Paul Hubert, published on the blog de l’OFCE in English and in French.

Paul Krugman raises the very important issue of the impact of monetary policy on financial stability. He starts with the well-known observation that, contrary to the predictions of some, expansionary monetary policy did not lead to inflation during the current crisis. He then continues arguing that tighter monetary policy would not necessarily guarantee financial stability either. If the Fed were to revert to a more standard Taylor rule, financial stability would not follow. As Krugman aptly argues, “That rule was devised to produce stable inflation; it would be a miracle, a benefaction from the gods, if that rule just happened to also be exactly what we need to avoid bubbles.

Krugman in fact takes position against the “conventional wisdom”, which has been widespread in academic and policy circles alike, that a link exists between financial and price stability; therefore the central bank can always keep in check financial instability by setting an appropriate inflation target.

The global financial crisis is a clear example of the fallacy of this conventional wisdom, as financial instability built up in a period of great moderation. A recent analysis by Blot et al shows that the crisis is no exception, as over the past few decades, in the US and the Eurozone, the link between price and financial stability has been unclear and moreover unstable over time, as shown on the following figure.


We therefore subscribe to Krugman’s view that financial stability should be targeted by combining macro- and micro-prudential policies, and that inflation targeting is largely insufficient. In another work, Blot et al argue that the ECB should be endowed with a triple mandate for financial and macroeconomic stability, along with price stability. They further argue that the ECB should be given the instruments to effectively pursue these three, sometimes conflicting objectives.

Wrong Debates

May 9, 2014 1 comment

Paul Krugman has a short post on the Eurozone, today (I’d like him to write more about us; he has been too America-centered lately), pointing out that the myth of fiscal profligacy is, well, just a myth. in fact, he argues, the only fiscally irresponsible country, in the years 2000 was Greece. It is maybe worth reposting here a figure that from an old piece of this blog, that since then made it into all my classes on the Euro crisis: Fig1PostMArch16
The figure shows the situation of public finances in 2007, against the Maastricht benchmark (3% deficit and 60% debt) before the crisis hit. As Krugman says, only one country of the so-called PIIGS  (the red dots) is clearly out of line, Greece. Portugal is virtually like France, and Spain and Ireland way better than most countries, including Germany. Italy has a stock of old debt, but its deficit in 2007 is under control.

So Krugman is right in reminding us that fiscal policy per se was not a problem before the crisis; And yet, what he calls fiscal myths, have shaped policies in the EMU, with a disproportionate emphasis on austerity. And even today, when economists overwhelmingly discuss unconventional measures available to the ECB to contrast deflation, fiscal policy is virtually absent from the debate and continued fiscal consolidation is taken for granted. I will write more on this in the next days, but it is striking how we aim at the wrong target.

What is Mainstream Economics?

November 29, 2013 14 comments

Paul Krugman and Simon Wren-Lewis have been widely criticized (for example here) as defending  “mainstream” economics that spectacularly failed during the crisis (and before).

My (very short) take on this: I do believe that Krugman has a point, a very good one, when claiming that standard textbook analysis is (almost) all you need to understand the current crisis, and to implement the correct policy solutions.
The point is what we define as “textbook analysis”. Krugman refers to IS-LM models. But these, that starting in the 1980s virtually disappeared from graduate curricula because supposedly too simplistic, not grounded on optimization, not intertemporal, and so on and so forth.
I personally was exposed to these ideas in my undergraduate studies in Italy, and I still teach them (besides using them to discuss the crisis with my students). But they were nowhere to be found during my graduate studies at Columbia (certainly not a freshwater school). None of the macro I studied in graduate school (Real Business Cycle models, or their fixed-price variant proposed by New Keynesians) as interesting as it was intellectually, could give me insight on the crisis. I simply do not need to use it.

The IS-LM model with minor amendments (most notably properly accounting for expectations to deal among other things with liquidity traps) remains a powerful tool to understand current phenomena. The problem is that it is not mainstream at all. What bothers me in Krugman’s post is the word “standard”, not “textbook analysis”.

Living in Terror of Dead Economists

May 24, 2013 6 comments

Kenneth Rogoff has a piece on the Project Syndicate that is revealing of today’s intellectual climate. What does he say?

  1. The eurozone problems are structural, and stem from a monetary and economic integration that was not followed (I’d say accompanied) by fiscal integration (a federal budget to be clear). Hard to disagree on that
  2. Without massive debt write-downs, no reasonable solution to the current mess seems feasible. Hard to disagree on that as well
  3. Some more inflation would be desirable, to bring down the value of debt. Hard to disagree on that as well.

In a sentence, intra eurozone imbalances are the source of the current crisis. Could not agree more…

Unfortunately, Rogoff does not stop here, but feels the irrepressible urge to add that

Temporary Keynesian demand measures may help to sustain short-run internal growth, but they will not solve France’s long-run competitiveness problems […] To my mind, using Germany’s balance sheet to help its neighbors directly is far more likely to work than is the presumed “trickle-down” effect of a German-led fiscal expansion. This, unfortunately, is what has been lost in the debate about Europe of late: However loud and aggressive the anti-austerity movement becomes, there still will be no simple Keynesian cure for the single currency’s debt and growth woes.

The question then arises. Who ever thought that a more expansionary stance in the eurozone would solve the French structural problems? And at the opposite, why would recognizing that France has structural problems make it less urgent to reverse the pro-cyclical fiscal stance of an eurozone that is desperately lacking domestic demand? Let me try to sort out things here. This is the way I see it: Read more

Cockroach Ideas and Weak Arguments

April 10, 2013 1 comment

Helene Mees in a Project Syndicate Comment weighs into the dispute between Paul Krugman and the Commission officials, siding with Rehn and his people.
Mees’ criticism of Krugman is two-sided. First, she argues, Krugman omits to say that the OMTs program is subject to heavy conditionality, and that the signature of the fiscal compact was a necessary precondition for the adoption of the program. I don’t get it. The ECB is very vocal on austerity and on structural reforms, and it is clear that the OMTs program was adopted only at the very last minute, facing the perspective of eurozone collapse. A number of economists, including myself, welcomed the OMTs while criticizing the heavy conditionality attached to it. The very fact that the OMTs was reluctantly adopted shows that even austerity partisans cannot deny the fact that the EMU is desperately lacking a proper lender of last resort, of which the OMT is a pale surrogate. The more non-Keynesian institutions are forced to adopt Keynesian solutions, the more Krugman’s point is vindicated. I fail to see how the opposite could be true. Read more

Stones Keep Raining

February 19, 2013 4 comments

Paul Krugman  hits hard on one of the most cherished american myths, the golden years of Reaganomics. He shows that using the middle class as a benchmark (the median family income of the economy), the Reagan decade saw a disappointing performance; this, not only if compared to the longest expansion in post war history, during the Clinton presidency, but also with respect to the much less glorious 1970s.

But, maybe, Krugman is telling a story of inequality, and not of sluggish growth. The fact that median income did not grow much during the Reagan years may not mean that growth was not satisfactory, but simply that somebody else grasped the fruits.

For curiosity, I completed his figure with average yearly growth rates for two other series: Income of the top 5% of the population, and the growth rate of the economy.


Well, it turns out that Reaganomics yielded increasing inequality and unsatisfactory growth. And well beyond that, median income consistently under-performed economic growth in the past forty years.

What seems extremely robust is the performance of the top 5% of the population. Their income increased significantly more than output over the past decades. It is striking  in particular, how the very wealthy managed to cruise through the current crisis, when income of the middle class was slashed.

Nothing new, Ken Loach in 1993 said it beautifully: it is always raining stones on the working class. But I guess it does no harm to remind it from time to time…