Business Cycle Accounting
Varadarajan V. Chari
University of Minnesota - Twin Cities - Department of Economics; Federal Reserve Bank of Minneapolis; National Bureau of Economic Research (NBER)
Patrick J. Kehoe
Federal Reserve Bank of Minneapolis - Research Department; University of Minnesota - Twin Cities - Department of Economics; National Bureau of Economic Research (NBER)
Ellen R. McGrattan
Federal Reserve Bank of Minneapolis - Research Department; University of Minnesota - Twin Cities; National Bureau of Economic Research (NBER)
NBER Working Paper No. w10351
We propose a simple method to help researchers develop quantitative models of economic fluctuations. The method rests on the insight that many models are equivalent to a prototype growth model with time-varying wedges which resemble productivity, labor and investment taxes, and government consumption. Wedges corresponding to these variables -- effciency, labor, investment, and government consumption wedges -- are measured and then fed back into the model in order to assess the fraction of various fluctuations they account for. Applying this method to U.S. data for the Great Depression and the 1982 recession reveals that the effciency and labor wedges together account for essentially all of the fluctuations; the investment wedge plays a decidedly tertiary role, and the government consumption wedge, none. Analyses of the entire postwar period and alternative model specifications support these results. Models with frictions manifested primarily as investment wedges are thus not promising for the study of business cycles.
Number of Pages in PDF File: 64
Date posted: January 5, 2007
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