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September 17, 2009
An agnostic gets a little religion
Yesterday's consumer price index (CPI) report showed further disinflation in August, at least on a year-over-year basis. Headline inflation was down 1.4 percent from last year, the largest 12-month decline since January 1950, save for the 2.1 percent decline the month before. Core inflation crept down to 1.5 percent in August, and private forecasters see slow price growth continuing through at least next year. The Blue Chip Economic Indicators, a monthly poll of around 50 business economists in the United States, showed consensus expectations for year-over-year growth in core CPI at 1.5 percent in 2010, a relatively low number compared with recent history, and a shade under the panel's forecast for 1.6 percent in 2009.
I'm a bit of an agnostic when it comes to the predictive capacity of the Phillips curve—the inverse relationship between unemployment and inflation. There is considerable evidence that looking at the gap between unemployment and the nonaccelerating inflation rate of unemployment (NAIRU, sometimes termed the natural rate of unemployment) isn't necessarily useful for estimating future inflation; Atkeson and Ohanian found that inflation predictions from Phillips curve–based models were no more accurate than a naïve forecast where future inflation is defined by its recent past, ignoring the current state of the economy. A more recent working paper by Stock and Watson supports Atkeson and Ohanian's evidence that the predictive abilities of Phillips curve forecasts are not very robust. But Stock and Watson also point out that when the gap is big, there is more information that can be gleaned.
"When the unemployment rate is near the NAIRU … Phillips curve models do worse than the UC-SV model [a modified version of the Atkeson-Ohanian naïve forecast]. But when the unemployment gap exceeds 1.5 in absolute value, the Phillips curve forecasts improve substantially upon the UC-SV model. Because the gap is largest in absolute value around turning points, this finding can be restated that the Phillips curve models provide improvements over the UC-SV model around turning points, but not during normal times."
Stock and Watson argue that large positive (or negative) unemployment gaps (like those usually found around turning points in the business cycle) do improve the inflation forecast. So when the unemployment gap swells—as it did following the 1990 and 2001 recessions—we should anticipate more downward pressure on inflation than the naïve models would have forecast. The chart above, which shows core CPI and the unemployment rate gap as estimated by the Congressional Budget Office (CBO), seems to bear out this point. High rates of unemployment following the 1990 and 2001 recessions were also associated with turning points in the core inflation trend.
If Stock and Watson have it right, then the huge rise in the unemployment rate we've seen over the past year isn't something that inflation forecasters will want to ignore, and the downward drift in core inflation associated with this recession could be with us for a while. That potential scenario follows their reasoning, but like I said, I'm an agnostic when it comes to Phillips curves.
By Laurel Graefe, senior economic research analyst at the Atlanta Fed
September 17, 2009 in Inflation | Permalink
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Comments
Posted by:
Ivan Kitov |
September 20, 2009 at 09:53 AM
Isn't the point of the Philips curve that there is a mechanized tradeoff function between unemployment and inflation? If so, bounding the application of the tradeoff to certain extreme values really negates the Philips curve concept entirely (at least in my estimation)
Posted by:
fischer |
September 20, 2009 at 11:52 AM
The Phillips curve is the least of my concerns.
No civilization can maintain a reserve currency while constantly funding its expenses by borrowing from rising powers indefinitely. It's never happened that way in world history. You guys believe in empircal study of history right?
By "reserve currency" I mean basically the currency that governments save in. Many governments have no savings as they are in debt, but some do. China and Russia have savings, they aren't issuing massive amounts of debt onto the world bond market(like we do)...they have over time taken in more money than they have spent...when they have savings they have a choice(save it in dollars/euros/silver/oil/nuclear missiles/corn etc)...when they hold it in dollars they are fine if the dollar is rising or stable in value.
read this:
http://www.nytimes.com/2009/03/24/world/asia/24china.html
This came out in March but people have been talking about China(and Japan) building up massive amounts of treasuries of years. Russia also has a lot. These three countries along with the oil producing mid-east countries(Saudi Arabia,Kuait,UAE) have played a big role in keeping the dollar up at relatively lofty levels...they continually buy the treasury bonds that the US government auctions off regularly throughout the year. traditionally when countries have deficits(as a percent of GDP) as high as we do, the curency starts to weaken. When you here that the US government has a budget deficit of 400 billion a year and now 1.8 trillion a year...that means someone is buying that many bonds during that year. Until now...this year the Fed started buying a good number of these bonds as well. Whend the fed buys the bonds from the US governemnt, they are just creating the dolalrs out of thin air. The countries that have dollar reserves are naturally worried by this, because if this trend were to keep going then it would eventually seriously devalue the dollar.
http://www.marketwatch.com/story/chinas-central-bank-fed-moves-put-bonds-at-risk
The argument you will hear from mainstream democrats and republicans(and there is some truth to it) is that china doesn't want to do this because if the dollar crash then americans would not be able to buy as much stuff from china factories(prices would be too high) and this would cause too much unemployment and political instability in China. HOWEVER, I think(and many others) that it is silly to think that China has not been well aware of this and that they do see it as a critical weaknes and they are trying to make themselves gradually less vulnerable AND if they feel they are really pushed into a corner by America that they would be willing to basically kill the dollar and suffer from the negative externalities...but that they would also have prepared their portfolio and position in a attempt to minimize the negative effect it would have on their economy.
They would do this by building up reserves of commodities, ownership of mines and natural resources through partnerships with african mnations(which they have done)...building massive stockpiles of copper,platinum, uranium, silver, nickel, gold, oil etc. and doing all this without gradually without causing too much panic int he market so they can get these positions built up as high as possible without causing everyone else to panic and force all these prices up before they can get their positions built up.
As you can see from the article and if you search on this topic you'll find many other example, they ARE CONCERNED. The question is would they ever get frustrated enough that they didn't propose some kinda UN'y IMF'y world government soft currency9as they have so far), but instead come right out and say "US we are tired of your armies in JAPAN, South Korea and your Taiwan posturing...get out of the far east or we will actively dump treasuries onto the market and convert all of our existing dollar reserves into precious metals. then we will issue new reserve curency together with Japan, Russia, Japan, Brazil. This curency will be backed by gold/silver and a set unit that is 100% fully redeemable at any time. We will not borrow money on this currency and we will not print this currency beyond the reserves we have in storage backed by the ageed upon commodity basket.
This seems like a drastic move, but it is certainly not as drastic as the US threatening people with nuclear weapons and certainly (if done correctly) it is not as self destructive as using nuclear weapons.
Posted by:
Gabe |
September 24, 2009 at 12:04 PM
Posted by: Ivan Kitov | September 20, 2009 at 09:53 AM
Isn't the relationship your talking about driven mostly by the fact that over the last two decades the Fed has tended towards raising interest rates after seeing the CPI spike?
Isn't it the raising of interest rates that is a stronger leading indicator of unemployment? and of course that is during a long 27 year boom phase caused by the expansion of the money supply since we completely divorced from gold in 1971. Things could be much different if the dollar loses it's reserve curency status.
Posted by:
Gabe |
September 24, 2009 at 04:55 PM

It is interesting that (CPI and GDP deflator) inflation has very low correlation with contemporary and past values of unemployment in the USA, but its correlation with unemployment 2.5 years in the future is more than 80% (see, for example, The Anti-Phillips curve http://mpra.ub.uni-muenchen.de/13641/). In other words, inflation can be treated as the driving force of unemployment, i.e. just opposite to that presumed by the conventional Phillips curve.)
Even in the current crisis the (month-on-month) inflation leads the unemployment by several months. So, the conventional Phillips curve has never been a right one for the USA and hardly become useful.