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Exchange Rate Dynamics and the Overshooting Hypothesis

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  • Jacob A. Frenkel
  • Carlos A. Rodriguez

Abstract

In this paper we analyze the determinants of the evolution of ex- change rates within the context of alternative models of exchange rate dynamics. We examine the overshooting hypothesis in models which emphasize differential speeds of adjustment in asset and goods markets as well as in models which emphasize portfolio balance considerations. We show that exchange rate overshooting is not an intrinsic characteristic of the foreign exchange market and that it depends on a set of specific assumptions. We also show that the overshooting is not a characteristic of the assumption of perfect foresight nor does it depend in general on the assumption that goods and asset markets clear at different speeds. As long as the speeds of adjustment in the various markets are less than infinite, the key factor determining the short run effects of a monetary expansion is the degree of capital mobility. When capital is highly mobile, the exchange rate overshoots its long-run value and when capital is relatively immobile the exchange rate undershoots its long-run value. Within the context of the portfolio-balance model we show that the effects of a monetary expansion on the dynamics of exchange rates and in particular on whether exchange rates overshoot or undershoot their equilibrium path depend critically on the specification of asset choice, on the degree of substitution among assets, and on the quality of the various assets in being an inflation hedge, Specifically, when internationally traded goods are a better inflation hedge than nontraded goods, the nominal exchange rate overshoots the domestic price level and conversely.

Suggested Citation

  • Jacob A. Frenkel & Carlos A. Rodriguez, 1982. "Exchange Rate Dynamics and the Overshooting Hypothesis," NBER Working Papers 0832, National Bureau of Economic Research, Inc.
  • Handle: RePEc:nbr:nberwo:0832
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    References listed on IDEAS

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    1. Wilson, Charles A, 1979. "Anticipated Shocks and Exchange Rate Dynamics," Journal of Political Economy, University of Chicago Press, vol. 87(3), pages 639-647, June.
    2. Frenkel, Jacob A, 1981. "Flexible Exchange Rates, Prices, and the Role of "News": Lessons from the 1970s," Journal of Political Economy, University of Chicago Press, vol. 89(4), pages 665-705, August.
    3. Calvo, Guillermo A & Rodriguez, Carlos Alfredo, 1977. "A Model of Exchange Rate Determination under Currency Substitution and Rational Expectations," Journal of Political Economy, University of Chicago Press, vol. 85(3), pages 617-625, June.
    4. Dornbusch, Rudiger & Fischer, Stanley, 1980. "Exchange Rates and the Current Account," American Economic Review, American Economic Association, vol. 70(5), pages 960-971, December.
    5. Ethier, Wilfred, 1979. "Expectations and the asset-market approach to the exchange rate," Journal of Monetary Economics, Elsevier, vol. 5(2), pages 259-282, April.
    6. Dornbusch, Rudiger, 1976. "Expectations and Exchange Rate Dynamics," Journal of Political Economy, University of Chicago Press, vol. 84(6), pages 1161-1176, December.
    7. Gray, Malcolm R & Turnovsky, Stephen J, 1979. "The Stability of Exchange Rate Dynamics under Perfect Myopic Foresight," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 20(3), pages 643-660, October.
    8. Niehans, Jurg, 1977. "Exchange Rate Dynamics with Stock/Flow Interaction," Journal of Political Economy, University of Chicago Press, vol. 85(6), pages 1245-1257, December.
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