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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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    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. 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.
    3. 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.
    4. 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.
    5. 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.
    6. 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.
    7. 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.
    8. 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.
    9. Chi‐Wei Su & Hsu‐Ling Chang & Yan Liu, 2013. "Real Interest Rate Parity and Two Structural Breaks: African Countries Evidence," African Development Review, African Development Bank, vol. 25(4), pages 478-484, December.
    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. H. Kent Baker & Satish Kumar & Kirti Goyal & Prashant Gupta, 2023. "International journal of finance and economics: A bibliometric overview," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 28(1), pages 9-46, January.
    12. 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.
    13. 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.
    14. 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.
    15. Humphries, Debbie L. & Dearden, Kirk A. & Crookston, Benjamin T. & Woldehanna, Tassew & Penny, Mary E. & Behrman, Jere R., 2017. "Household food group expenditure patterns are associated with child anthropometry at ages 5, 8 and 12 years in Ethiopia, India, Peru and Vietnam," Economics & Human Biology, Elsevier, vol. 26(C), pages 30-41.
    16. 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," NBS Discussion Papers in Economics 2009/1, Economics, Nottingham Business School, Nottingham Trent University.
    17. 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.
    18. Hachmi Ben Ameur & Zied Ftiti & Eric Le Fur, 2024. "What can we learn from the analysis of the fine wines market efficiency?," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 29(1), pages 703-718, January.
    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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