Keynes, Cocoa, and Copper : In Search of Commodity Currencies

Author/Editor:

Ratna Sahay ; Luis Felipe Céspedes ; Paul Cashin

Publication Date:

December 1, 2002

Electronic Access:

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Disclaimer: This Working Paper should not be reported as representing the views of the IMF.The views expressed in this Working Paper are those of the author(s) and do not necessarily represent those of the IMF or IMF policy. Working Papers describe research in progress by the author(s) and are published to elicit comments and to further debate

Summary:

This paper examines whether the real exchange rates of commodity-exporting countries and the real prices of their commodity exports move together over time. Using IMF data on the world prices of 44 commodities and national commodity export shares, we construct new monthly indices of national commodity export prices for 58 countries over 1980-2002. A long-run relationship between real exchange rates and real commodity prices is found for about two-fifths of the commodity-exporting countries. Also, the behavior of the real exchange rate of commodity currencies is found to be independent of the nominal exchange rate regime. The average half-life of adjustment of real exchange rates to commodity-price-augmented purchasing power parity is found to be about eight months, which is much shorter than Rogoff’s (1996) consensus estimate of three to five years, and provides an important missing piece of the PPP puzzle.

Series:

Working Paper No. 02/223

Subject:

English

Publication Date:

December 1, 2002

ISBN/ISSN:

9781451875300/1018-5941

Stock No:

WPIEA2232002

Format:

Paper

Pages:

63

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