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Is PPP sensitive to time-varying trade weights in constructing real effective exchange rates?

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Author Info

  • Bahmani-Oskooee, Mohsen
  • Hegerty, Scott W.
  • Kutan, Ali M.

Abstract

While the use of real effective exchange rates in stationarity tests of purchasing power parity (PPP) avoids the problems created using bilateral rates, these rates are often constructed using trade shares that are fixed at a single base year. This method fails to take into account the fact that trade shares can change drastically in parts of the world that are undergoing dramatic transformations. In this study, we apply linear as well as nonlinear stationarity tests to 52 currencies' real effective rates, which were constructed using time-varying weights. Incorporating a time trend, we are also able to assess whether breakdowns in PPP are due to productivity differentials. We find that while nonlinear tests provide more evidence of "productivity bias" than do linear tests, they do not provide much more evidence of PPP. A comparison to a previous study that used fixed-weight data shows that there is somewhat more evidence of productivity bias using the new dataset, especially in Eastern Europe and Asia. We can conclude that PPP and a key cause of its breakdown are somewhat sensitive to the use of time-varying weights in these stationarity tests.

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Bibliographic Info

Article provided by Elsevier in its journal The Quarterly Review of Economics and Finance.

Volume (Year): 49 (2009)
Issue (Month): 3 (August)
Pages: 1001-1008

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Handle: RePEc:eee:quaeco:v:49:y:2009:i:3:p:1001-1008

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Web page: http://www.elsevier.com/locate/inca/620167

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Keywords: Time varying weights Effective exchange rates PPP;

References

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  1. Bahmani-Oskooee, Mohsen, 1998. "Do exchange rates follow a random walk process in Middle Eastern countries?," Economics Letters, Elsevier, vol. 58(3), pages 339-344, March.
  2. van Dijk, Dick & Teräsvirta, Timo & Franses, Philip Hans, 2000. "Smooth Transition Autoregressive Models - A Survey of Recent Developments," Working Paper Series in Economics and Finance 380, Stockholm School of Economics, revised 17 Jan 2001.
  3. Kapetanios, George & Shin, Yongcheol & Snell, Andy, 2003. "Testing for a unit root in the nonlinear STAR framework," Journal of Econometrics, Elsevier, vol. 112(2), pages 359-379, February.
  4. Sarno, Lucio, 2000. "Real exchange rate behavior in the Middle East: a re-examination," Economics Letters, Elsevier, vol. 66(2), pages 127-136, February.
  5. Mohsen Bahmani-Oskooee & ABM Nasir, 2005. "Productivity Bias Hypothesis and The Purchasing Power Parity: a review article," Journal of Economic Surveys, Wiley Blackwell, vol. 19(4), pages 671-696, 09.
  6. Taylor Mark P. & Sarno Lucio, 2001. "Real Exchange Rate Dynamics in Transition Economies: A Nonlinear Analysis," Studies in Nonlinear Dynamics & Econometrics, De Gruyter, vol. 5(3), pages 1-26, October.
  7. Hyginus Leon & Serineh Najarian, 2005. "Asymmetric adjustment and nonlinear dynamics in real exchange rates," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 10(1), pages 15-39.
  8. Taylor, Alan M & Taylor, Mark P, 2004. "The Purchasing Power Parity Debate," CEPR Discussion Papers 4495, C.E.P.R. Discussion Papers.
  9. Michael, Panos & Nobay, A Robert & Peel, David A, 1997. "Transactions Costs and Nonlinear Adjustment in Real Exchange Rates: An Empirical Investigation," Journal of Political Economy, University of Chicago Press, vol. 105(4), pages 862-79, August.
  10. Ivan Paya & Ioannis A. Venetis & David A. Peel, 2003. "Further Evidence on PPP Adjustment Speeds: the Case of Effective Real Exchange Rates and the EMS," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 65(4), pages 421-437, 09.
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Cited by:
  1. Frederick H Wallace & Daniel Ventosa-santaulària & Manuel Gómez-zaldívar, 2014. "Is The Real Effective Exchange Rate Biased Against the PPP Hypothesis?," Economics Bulletin, AccessEcon, vol. 34(1), pages 395-399.
  2. Su, Jen-Je & Cheung, Adrian (Wai-Kong) & Roca, Eduardo, 2014. "Does Purchasing Power Parity hold? New evidence from wild-bootstrapped nonlinear unit root tests in the presence of heteroskedasticity," Economic Modelling, Elsevier, vol. 36(C), pages 161-171.
  3. Marcel Aloy & Mohamed Boutahar & Karine Gente & Anne Peguin-Feissolle, 2011. "Purchasing power parity and the long memory properties of real exchange rates: does one size fit all?," Working Papers halshs-00559170, HAL.

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