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Modeling Deviations from Purchasing Power Parity (PPP)

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  • Aizenman, Joshua

Abstract

The volatility of the exchange rate under floating rates can be interpreted in terms of approaches that allow for short term price rigidity as well as in terms of models that consider the magnification effect of new information. This paper combines the two approaches into a unified framework,where the degree to which prices are rigid is determined endogenously. It is shown that the variance of percentage deviations from ppp has an upper bound,and that the relationship between the variance of deviations from ppp and the aggregate variability is not monotonic. Allowing for a short-run Phillips curve with optimal indexation, it is also demonstrated that a higher price flexibility will reduce deviations from ppp and output volatility.
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  • Aizenman, Joshua, 1984. "Modeling Deviations from Purchasing Power Parity (PPP)," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 25(1), pages 175-191, February.
    • Handle: RePEc:ier:iecrev:v:25:y:1984:i:1:p:175-91
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    Cited by:

    1. Kargbo, Joseph M., 2003. "Cointegration Tests of Purchasing Power Parity in Africa," World Development, Elsevier, vol. 31(10), pages 1673-1685, October.
    2. Sebastian Edwards, 1986. "Real Exchange Rate Variability: An Empirical Analysis of the Developing Countries Case," NBER Working Papers 1930, National Bureau of Economic Research, Inc.
    3. Aizenman, Joshua, 2004. "Endogenous pricing to market and financing costs," Journal of Monetary Economics, Elsevier, vol. 51(4), pages 691-712, May.
    4. Irving B. Kravis & Robert E. Lipsey, 1982. "Towards an Explanation of National Price Levels," NBER Working Papers 1034, National Bureau of Economic Research, Inc.
    5. Marek Mičúch, 2009. "Vývoj teorie parity kupní síly a rovnovážný měnový kurz [Purchasing power parity and the equilibrium exchange rate]," Politická ekonomie, Prague University of Economics and Business, vol. 2009(3), pages 405-428.
    6. Olayinka Oyekola, 2022. "How Resilient Is the U.S. Economy to Foreign Disturbances?," Mathematics, MDPI, vol. 10(9), pages 1-33, April.

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