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International real interest rate differentials, purchasing power parity and the behaviour of real exchange rates: the resolution of a conundrum

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  • Mark P. Taylor

    (University of Warwick, and Centre for Economic Policy Research, UK)

  • Lucio Sarno

    (University of Warwick, and Centre for Economic Policy Research, UK)

Abstract

According to one strand of the international finance literature, market efficiency implies that the real exchange rate follows a martingale process, in direct conflict with the long-run absolute purchasing power parity hypothesis, which requires a stationary real exchange rate process. This conflict between market efficiency and long-run PPP appears as something of a conundrum. We resolve this conundrum by relaxing the assumption of a constant real interest rate differential and analysing the vector equilibrium correction system linking prices and the exchange rate, and draw out the economic intuition of our result. Copyright © 2004 John Wiley & Sons, Ltd.

Suggested Citation

  • Mark P. Taylor & Lucio Sarno, 2004. "International real interest rate differentials, purchasing power parity and the behaviour of real exchange rates: the resolution of a conundrum," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 9(1), pages 15-23.
  • Handle: RePEc:ijf:ijfiec:v:9:y:2004:i:1:p:15-23
    DOI: 10.1002/ijfe.232
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    References listed on IDEAS

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    1. Frenkel, Jacob A, 1976. " A Monetary Approach to the Exchange Rate: Doctrinal Aspects and Empirical Evidence," Scandinavian Journal of Economics, Wiley Blackwell, vol. 78(2), pages 200-224.
    2. Cheung, Yin-Wong & Lai, Kon S., 2000. "On cross-country differences in the persistence of real exchange rates," Journal of International Economics, Elsevier, vol. 50(2), pages 375-397, April.
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    4. Mark P. Taylor, 1995. "The Economics of Exchange Rates," Journal of Economic Literature, American Economic Association, vol. 33(1), pages 13-47, March.
    5. Mark, Nelson C. & Choi, Doo-Yull, 1997. "Real exchange-rate prediction over long horizons," Journal of International Economics, Elsevier, vol. 43(1-2), pages 29-60, August.
    6. Frankel, Jeffrey A, 1979. "On the Mark: A Theory of Floating Exchange Rates Based on Real Interest Differentials," American Economic Review, American Economic Association, vol. 69(4), pages 610-622, September.
    7. Abuaf, Niso & Jorion, Philippe, 1990. " Purchasing Power Parity in the Long Run," Journal of Finance, American Finance Association, vol. 45(1), pages 157-174, March.
    8. Mussa, Michael, 1979. "Empirical regularities in the behavior of exchange rates and theories of the foreign exchange market," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 11(1), pages 9-57, January.
    9. Mark, Nelson C, 1995. "Exchange Rates and Fundamentals: Evidence on Long-Horizon Predictability," American Economic Review, American Economic Association, vol. 85(1), pages 201-218, March.
    10. Mark, Nelson C, 1985. "A Note on International Real Interest Rate Differentials," The Review of Economics and Statistics, MIT Press, vol. 67(4), pages 681-684, November.
    11. Richard H. Clarida & Mark P. Taylor, 1997. "The Term Structure Of Forward Exchange Premiums And The Forecastability Of Spot Exchange Rates: Correcting The Errors," The Review of Economics and Statistics, MIT Press, vol. 79(3), pages 353-361, August.
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    Citations

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    Cited by:

    1. McMillan, David G., 2009. "The confusing time-series behaviour of real exchange rates: Are asymmetries important?," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 19(4), pages 692-711, October.
    2. Juan Carlos Cuestas & Barry Harrison, 2010. "Further Evidence on the Real Interest Rate Parity Hypothesis in Central and East European Countries: Unit Roots and Nonlinearities," Emerging Markets Finance and Trade, Taylor & Francis Journals, vol. 46(6), pages 22-39, November.
    3. Beckmann, Joscha & Czudaj, Robert, 2017. "The impact of uncertainty on professional exchange rate forecasts," Journal of International Money and Finance, Elsevier, vol. 73(PB), pages 296-316.
    4. Robert Sollis & Mark E. Wohar, 2006. "The real exchange rate-real interest rate relation: evidence from tests for symmetric and asymmetric threshold cointegration," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 11(2), pages 139-153.
    5. repec:eee:jimfin:v:74:y:2017:i:c:p:283-300 is not listed on IDEAS
    6. Patrick Minford & David Peel, 2007. "On the Equality of Real Interest Rates Across Borders in Integrated Capital Markets," Open Economies Review, Springer, vol. 18(1), pages 119-125, February.
    7. Alan M. Taylor & Mark P. Taylor, 2004. "The Purchasing Power Parity Debate," Journal of Economic Perspectives, American Economic Association, vol. 18(4), pages 135-158, Fall.
    8. Joscha Beckmann & Robert Czudaj, 2017. "Effective Exchange Rates, Current Accounts and Global Imbalances," Review of International Economics, Wiley Blackwell, vol. 25(3), pages 500-533, August.
    9. Volosovych, Vadym, 2011. "Measuring financial market integration over the long run: Is there a U-shape?," Journal of International Money and Finance, Elsevier, vol. 30(7), pages 1535-1561.
    10. Liu, Lin & Chang, Hsu-Ling & Su, Chi-Wei & Jiang, Chun, 2013. "Real interest rate parity in East Asian countries based on China with flexible Fourier stationary test," Japan and the World Economy, Elsevier, vol. 25, pages 52-58.
    11. Hwa-Taek Lee & Gawon Yoon, 2013. "Does purchasing power parity hold sometimes? Regime switching in real exchange rates," Applied Economics, Taylor & Francis Journals, vol. 45(16), pages 2279-2294, June.
    12. Kenneth W. Clements & Yihui Lan, 2005. "How Long is the Long Run? Evidence from the Foreign Exchange Market," Economics Discussion / Working Papers 05-03, The University of Western Australia, Department of Economics.
    13. Su, Chi-Wei & Chang, Hsu-Ling & Liu, Lin, 2012. "Real interest rate parity with Flexible Fourier stationary test for Central and Eastern European countries," Economic Modelling, Elsevier, vol. 29(6), pages 2719-2723.
    14. repec:eee:ehbiol:v:26:y:2017:i:c:p:30-41 is not listed on IDEAS
    15. Juan Carlos Cuestas & Barry Harrison, 2009. "Further evidence on the Real Interest Rate Parity hypothesis in Central and Eastern European Countries: unit roots and nonlinearities," Working Papers 2009/1, Nottingham Trent University, Nottingham Business School, Economics Division.
    16. Wen Zhang & Hsu-Ling Chang & Chi-Wei Su, 2014. "Do real interest rates converge across Latin american countries?," Portuguese Economic Journal, Springer;Instituto Superior de Economia e Gestao, vol. 13(2), pages 117-130, August.
    17. Juan Carlos Cuestas & Barry Harrison, 2010. "Further Evidence on the Real Interest Rate Parity Hypothesis in Central and East European Countries: Unit Roots and Nonlinearities," Emerging Markets Finance and Trade, M.E. Sharpe, Inc., vol. 46(6), pages 22-39, November.
    18. Beckmann, Joscha & Czudaj, Robert, 2017. "Exchange rate expectations since the financial crisis: Performance evaluation and the role of monetary policy and safe haven," Journal of International Money and Finance, Elsevier, vol. 74(C), pages 283-300.
    19. Liu, Yan & Chang, Hsu-Ling & Su, Chi-Wei, 2013. "Do real interest rates converge across East Asian countries based on China?," Economic Modelling, Elsevier, vol. 31(C), pages 467-473.

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