How Much Do Official Price Indexes Tell Us about Inflation?
Official price indexes, such as the CPI, are imperfect indicators of inflation calculated using ad hoc price formulae different from the theoretically well-founded inflation indexes favored by economists. This paper provides the first estimate of how accurately the CPI informs us about "true" inflation. We use the largest price and quantity dataset ever employed in economics to build a Törnqvist inflation index for Japan between 1989 and 2010. Our comparison of this true inflation index with the CPI indicates that the CPI bias is not constant but depends on the level of inflation. We show the informativeness of the CPI rises with inflation. When measured inflation is low (less than 2.4% per year) the CPI is a poor predictor of true inflation even over 12-month periods. Outside this range, the CPI is a much better measure of inflation. We find that the U.S. PCE Deflator methodology is superior to the Japanese CPI methodology but still exhibits substantial measurement error and biases rendering it a problematic predictor of inflation in low inflation regimes as well.
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- Etienne Gagnon, 2006.
"Price Setting during Low and High Inflation: Evidence from Mexico,"
2006 Meeting Papers
300, Society for Economic Dynamics.
- Etienne Gagnon, 2009. "Price Setting during Low and High Inflation: Evidence from Mexico," The Quarterly Journal of Economics, Oxford University Press, vol. 124(3), pages 1221-1263.
- Etienne Gagnon, 2007. "Price setting during low and high inflation: evidence from Mexico," International Finance Discussion Papers 896, Board of Governors of the Federal Reserve System (U.S.).
- Friedman, Milton, 1977. "Nobel Lecture: Inflation and Unemployment," Journal of Political Economy, University of Chicago Press, vol. 85(3), pages 451-472, June.
- Stanley Fischer, 1981. "Relative Shocks, Relative Price Variability, and Inflation," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 12(2), pages 381-442.
- Abe, Naohito & Tonogi, Akiyuki, 2010. "Micro and macro price dynamics in daily data," Journal of Monetary Economics, Elsevier, vol. 57(6), pages 716-728, September.
- David E. Lebow & Jeremy B. Rudd, 2003. "Measurement Error in the Consumer Price Index: Where Do We Stand?," Journal of Economic Literature, American Economic Association, vol. 41(1), pages 159-201, March.
- Vining, Daniel R, Jr & Elwertowski, Thomas C, 1976. "The Relationship between Relative Prices and the General Price Level," American Economic Review, American Economic Association, vol. 66(4), pages 699-708, September.
- Laurence Ball, 1990.
"Why Does High Inflation Raise Inflation Uncertainty?,"
NBER Working Papers
3224, National Bureau of Economic Research, Inc.
- Ball, Laurence, 1992. "Why does high inflation raise inflation uncertainty?," Journal of Monetary Economics, Elsevier, vol. 29(3), pages 371-388, June.
- Parks, Richard W, 1978. "Inflation and Relative Price Variability," Journal of Political Economy, University of Chicago Press, vol. 86(1), pages 79-95, February.
- Christian Broda & David E. Weinstein, 2007.
"Product Creation and Destruction: Evidence and Price Implications,"
NBER Working Papers
13041, National Bureau of Economic Research, Inc.
- Christian Broda & David E. Weinstein, 2010. "Product Creation and Destruction: Evidence and Price Implications," American Economic Review, American Economic Association, vol. 100(3), pages 691-723, June.
- Jerry Hausman, 2003. "Sources of Bias and Solutions to Bias in the Consumer Price Index," Journal of Economic Perspectives, American Economic Association, vol. 17(1), pages 23-44, Winter.
- Stockton, David J, 1988. "Relative Price Dispersion, Aggregate Price Movement, and the Natural Rate of Unemployment," Economic Inquiry, Western Economic Association International, vol. 26(1), pages 1-22, January.
- Aoki, Kosuke, 2003. "On the optimal monetary policy response to noisy indicators," Journal of Monetary Economics, Elsevier, vol. 50(3), pages 501-523, April.
- Kiley, Michael T, 2000.
"Endogenous Price Stickiness and Business Cycle Persistence,"
Journal of Money, Credit and Banking,
Blackwell Publishing, vol. 32(1), pages 28-53, February.
- Michael T. Kiley, 1996. "Endogenous price stickiness and business cycle persistence," Finance and Economics Discussion Series 96-23, Board of Governors of the Federal Reserve System (U.S.).
- Laurence Ball & N. Gregory Mankiw & David Romer, 1988. "The New Keynsesian Economics and the Output-Inflation Trade-off," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 19(1), pages 1-82.
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