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Modeling Deviations from Purchasing Power Parity (PPP)

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  • Joshua Aizenman

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.

Suggested Citation

  • Joshua Aizenman, 1983. "Modeling Deviations from Purchasing Power Parity (PPP)," NBER Working Papers 1066, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:1066
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    Cited by:

    1. Aizenman, Joshua, 2004. "Endogenous pricing to market and financing costs," Journal of Monetary Economics, Elsevier, vol. 51(4), pages 691-712, May.
    2. Olayinka Oyekola, 2022. "How Resilient Is the U.S. Economy to Foreign Disturbances?," Mathematics, MDPI, vol. 10(9), pages 1-33, April.
    3. Kargbo, Joseph M., 2003. "Cointegration Tests of Purchasing Power Parity in Africa," World Development, Elsevier, vol. 31(10), pages 1673-1685, October.
    4. 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.
    5. Faruqee, Hamid, 1996. "Real exchange rates and the pattern of trade: comparative dynamics for north and south," Journal of International Money and Finance, Elsevier, vol. 15(2), pages 313-336, April.
    6. Irving B. Kravis & Robert E. Lipsey, 1982. "Towards an Explanation of National Price Levels," NBER Working Papers 1034, National Bureau of Economic Research, Inc.
    7. 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.

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