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Decline in the Persistence of Real Exchange Rates : But Not Sufficient for Purchasing Power Parity

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  • OKIMOTO, Tatsuyoshi
  • 沖本, 竜義
  • SHIMOTSU, Katsumi
  • 下津, 克己

Abstract

The paper investigates the possibility of decline in the persistence of real exchange rates, or deviations from PPP. To this end, we test the null hypothesis of no decline in the PPP deviation persistence between two subsamples using a fractional integration framework. The test rejects the null at the 10% significance level for nine out of 17 countries, providing solid evidence for a decline in the persistence of real exchange rates. However, the decline is not sufficient for PPP, meaning we fail to reject the unit root hypothesis even in the latter period for all 17 countries. In addition, our rolling-window estimates show that the real exchange rate of many countries have experienced a sharp drop in their persistence once we use samples starting from the mid-1980s. Finally, we examine the relationship between the dynamics of PPP deviation persistence and several economic variables and confirm that the speed of convergence of PPP deviations is highly related to economic/financial integration and world economic stabilization.
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  • OKIMOTO, Tatsuyoshi & 沖本, 竜義 & SHIMOTSU, Katsumi & 下津, 克己, 2010. "Decline in the Persistence of Real Exchange Rates : But Not Sufficient for Purchasing Power Parity," Discussion Papers 2010-06, Graduate School of Economics, Hitotsubashi University.
    • Handle: RePEc:hit:econdp:2010-06
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    3. André M. Marques, 2022. "Reviewing demand regimes in open economies with Penn World Table data," Manchester School, University of Manchester, vol. 90(6), pages 730-751, December.
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    6. Luis Alberiko Gil-Alana & Tommaso Trani, 2019. "An examination of trade-weighted real exchange rates based on fractional integration," International Economics, CEPII research center, issue 158, pages 64-76.
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    More about this item

    Keywords

    deviations from PPP; economic stabilization; financial integration;
    All these keywords.

    JEL classification:

    • C14 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Semiparametric and Nonparametric Methods: General
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • F31 - International Economics - - International Finance - - - Foreign Exchange
    • F36 - International Economics - - International Finance - - - Financial Aspects of Economic Integration

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