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Commodity Prices and Inflation: Evidence From Seven Large Industrial Countries

Listed author(s):
  • James M. Boughton
  • William H. Branson
  • Alphecca Muttardy

This paper examines the relationships between movements in primary commodity prices and changes in inflation in the large industrial countries. It begins by developing a two-country model in order to examine the theoretical effects of monetary, fiscal, and supply-side disturbances on commodity and manufactures prices and on exchange rates. It is shown that if monetary shocks dominate, then commodity prices should lead general price movements, and the level of commodity prices should be correlated with the general inflation rate. Non-monetary shocks generally weaken these relationships, but such disturbances may cancel out for broad indexes covering a wide range of commodities. Country-specific commodity price indexes are developed for the major industrial countries. The weights assigned to different commodities vary substantially across countries. Nonetheless, when the indexes are expressed in a common currency, they tend to be highly correlated over time, except when sharp movements occur in certain commodity prices. The major source of contrast across countries in the behavior of the indexes derives from exchange rate movements. Several empirical tests broadly support the conclusions of the theoretical model, with relatively few differences across countries. Three main tendencies may be cited. First, low inflation in industrial countries has tended to be associated with low levels of commodity prices, and conversely; commodity-price levels are cointegrated with consumer-price inflation rates. Second, there has been some tendency for movements in commodity prices to precede changes in general inflation rates by a few months, although it is not clear whether this tendency is strong enough to be a reliable aid in forecasting the rate of inflation. Third, there s a strong and fairly reliable tendency for turning points in general inflation rates. Commodity prices thus appear to contribute to predictions of turning points in inflation, predictions of inflation rates but more strongly to predictions of turning points in inflation.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 3158.

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Date of creation: Nov 1989
Handle: RePEc:nbr:nberwo:3158
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  1. Krugman, Paul, 1979. "A Model of Balance-of-Payments Crises," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 11(3), pages 311-325, August.
  2. Karen K. Lewis, 1990. "Occasional Interventions to Target Rates with a Foreign Exchange Application," NBER Working Papers 3398, National Bureau of Economic Research, Inc.
  3. Paul R. Krugman, 1991. "Target Zones and Exchange Rate Dynamics," The Quarterly Journal of Economics, Oxford University Press, vol. 106(3), pages 669-682.
  4. Flood, Robert P & Garber, Peter M, 1983. "A Model of Stochastic Process Switching," Econometrica, Econometric Society, vol. 51(3), pages 537-551, May.
  5. Dornbusch, Rudiger, 1987. "Collapsing exchange rate regimes," Journal of Development Economics, Elsevier, vol. 27(1-2), pages 71-83, October.
  6. Robert P. Flood & Peter M. Garber, 1989. "The Linkage Between Speculative Attack and Target Zone Models of Exchange Rates," NBER Working Papers 2918, National Bureau of Economic Research, Inc.
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