Hey, a thread about Krugman, almost missed it.
; )
What does he have to say today?
Jul 15 10:42 amJul 15 10:42 am 22
On the Neo-paleo-Keynesian Phillips Curve (Wonkish)
"In a previous post I mentioned, sort of in passing, that recent data actually look like an old-fashioned pre-accelerationist Phillips curve â that is, unemployment determines the inflation rate, not the rate of change of the inflation rate.
"Where did this assertion come from? There seems to be one of these funny situations right now where people who donât work on such issues consider this a wild and crazy, or maybe just silly assertion, while those actually doing serious empirical work treat it as a matter of course.
"Hereâs what you see if you look at US data:
<img src="http://graphics8.nytimes.com/images/2014/07/15/opinion/071514krugman1/071514krugman1-blog480.png">
"But is that just me? No. Consider two recent studies on unemployment and inflation.
"First, thereâs Michael Kiley (pdf), who had the very good idea of adding power by estimating the relationship across a number of metropolitan areas.You need to read it carefully, but it turns out that his Phillips curve is non-accelerationist for the past 15 years:
"We estimate equation 2 over two sample periods (as in our national es- timates), 1985-2013 and 1998-2013. For the 1985-2013 sample, we proxy expected inflation with a region-specific intercept and the national measure of long-run expected inflation from the Survey of Professional forecasters used in our national regression; for the 1998-2013 sample, region fixed ef- fects are used to proxy for expected inflation (because, as in the national regressions presented earlier, the survey measure of expected inflation is es- sentially constant over the 1998-2013 period)."
"Then thereâs the new post by Klitgaard and Peck at Liberty Street, which essentially does a similar exercise for eurozone countries. Their results look like this:
<img src="http://graphics8.nytimes.com/images/2014/07/15/opinion/071514krugman2/071514krugman2-blog480.png">
"Thatâs a relationship between the change in unemployment and the change in inflation, equivalent to a relationship between the level of unemployment and the level of inflation â i.e., an old-fashioned Phillips curve.
"Iâm not saying that this is a fundamental truth. All Iâm saying is that people trying to fit recent data keep finding something that looks like the old-fashioned relationship. You can offer various explanations â downward wage rigidity, anchored expectations, or maybe it just isnât worth adjusting price-setting to match fairly small variations in expected inflation. But anyway, thatâs what the data look like."
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Crazy stuff!