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http://ssrn.com/abstract=246875
 
 

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Measuring Core Inflation


Michael F. Bryan


Federal Reserve Bank of Cleveland; Federal Reserve Banks - Federal Reserve Bank of Atlanta

Stephen G. Cecchetti


Brandeis International Business School; National Bureau of Economic Research (NBER); Centre for Economic Policy Research (CEPR)

March 1993

NBER Working Paper No. w4303

Abstract:     
In this paper, we investigate the use of limited-information estimators as measures of core inflation. Employing a model of asymmetric supply disturbances, with costly price adjustment, we show how the observed skewness in the cross-sectional distribution of inflation can cause substantial noise in the aggregate price index at high frequencies. The model suggests that limited-influence estimators, such as the median of the cross-sectional distribution of inflation, will provide superior short-run measures of core inflation. We document that our estimates of inflation have a higher correlation with past money growth and deliver improved forecasts of future inflation relative to the CPI. Moreover, unlike the CPI, the limited-influence estimators do not forecast future money growth, suggesting that monetary policy has often accommodated supply shocks that we measure as the difference between core inflation and the CPI. Among the three limited-influence estimators we consider - the CP1 excluding food and energy, the IS-percent trimmed mean, and the median - we find that the median has the strongest relationship with past money growth and provides the most accurate forecast of future inflation. Using the median and several other variables including nominal interest rates and M2, our best forecast is that in the absence of monetary accommodation of any future aggregate supply shocks, inflation will average roughly 3 percent per year over the next five years.

Number of Pages in PDF File: 30

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Date posted: February 5, 2001  

Suggested Citation

Bryan, Michael F. and Cecchetti, Stephen G., Measuring Core Inflation (March 1993). NBER Working Paper No. w4303. Available at SSRN: http://ssrn.com/abstract=246875

Contact Information

Michael F. Bryan (Contact Author)
Federal Reserve Bank of Cleveland ( email )
PO Box 6387
Cleveland, OH 44101
United States
Federal Reserve Banks - Federal Reserve Bank of Atlanta
1000 Peachtree Street N.E.
Atlanta, GA 30309-4470
United States
Stephen G. Cecchetti
Brandeis International Business School ( email )
415 South Street
Waltham, MA 02453
United States
National Bureau of Economic Research (NBER) ( email )
1050 Massachusetts Avenue
Cambridge, MA 02138
United States
212-720-8629 (Phone)
212-720-2630 (Fax)
Centre for Economic Policy Research (CEPR) ( email )
77 Bastwick Street
London, EC1V 3PZ
United Kingdom
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