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The Validity of PPP Revisited: An Application of Non-linear Unit Root Test

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Venus Khim-Sen Liew (Universiti Putra Malaysia)

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Abstract

To this end, the validity of purchasing power parity (PPP) remains a controversial issue, as empirical evidence is inconclusive. This study provides robust empirical evidence to support the view that negligence of non-linearity may be the culprit of these contrasting findings. This paper demonstrates that the non-linear unit root test proposed by Kapetanois et al. [Journal of Econometrics, 2003, 112, pp.359-379] is able to reject unit root in 4 out of 5 cases, implying that deviations of exchange rates is mean reverting towards the PPP equilibrium values from the non-linear perspective, whereas the augmented Dickey-Fuller (ADF) test fails in 4 out of 5 cases. Thus, previous conclusions of the invalidity of PPP may be due to misleading results from the ADF test, which has low power against non-linearity.

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Paper provided by EconWPA in its series International Finance with number 0308001.

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Date of creation: 03 Aug 2003
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Handle: RePEc:wpa:wuwpif:0308001

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Related research
Keywords: Purchasing power parity; Mean reversion; ASEAN economies; Real exchange rates; Non-linear unit root.;

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Find related papers by JEL classification:
F31 - International Economics - - International Finance - - - Foreign Exchange

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

  1. O'Connell, Paul G. J., 1998. "The overvaluation of purchasing power parity," Journal of International Economics, Elsevier, vol. 44(1), pages 1-19, February. [Downloadable!] (restricted)
  2. Edison, Hali J. & Fisher, Eric O'N, 1991. "A long-run view of the European monetary system," Journal of International Money and Finance, Elsevier, vol. 10(1), pages 53-70, March. [Downloadable!] (restricted)
    Other versions:
  3. Pesaran, M Hashem & Potter, Simon M, 1992. "Nonlinear Dynamics and Econometrics: An Introduction," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 7(S), pages S1-7, Suppl. De. [Downloadable!] (restricted)
  4. Hsieh, David A, 1989. "Testing for Nonlinear Dependence in Daily Foreign Exchange Rates," Journal of Business, University of Chicago Press, vol. 62(3), pages 339-68, July. [Downloadable!] (restricted)
  5. Kenneth Rogoff, 1996. "The Purchasing Power Parity Puzzle," Journal of Economic Literature, American Economic Association, vol. 34(2), pages 647-668, June. [Downloadable!] (restricted)
  6. repec:att:wimass:199520 is not listed on IDEAS
  7. Corbae, Dean & Ouliaris, Sam, 1988. "Cointegration and Tests of Purchasing Power Parity," The Review of Economics and Statistics, MIT Press, vol. 70(3), pages 508-11, August. [Downloadable!] (restricted)
  8. Coakley, Jerry & Fuertes, Ana-Maria, 2001. "Nonparametric Cointegration Analysis of Real Exchange Rates," Applied Financial Economics, Taylor and Francis Journals, vol. 11(1), pages 1-8, February. [Downloadable!] (restricted)
  9. Taylor, Mark P. & Peel, David A., 2000. "Nonlinear adjustment, long-run equilibrium and exchange rate fundamentals," Journal of International Money and Finance, Elsevier, vol. 19(1), pages 33-53, February. [Downloadable!] (restricted)
  10. William A. Barnett & Apostolos Serletis, 1998. "Martingales, Nonlinearity, and Chaos," Econometrics 9805003, EconWPA. [Downloadable!]
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  11. Baum, Christopher F. & Barkoulas, John T. & Caglayan, Mustafa, 1999. "Long memory or structural breaks: can either explain nonstationary real exchange rates under the current float?," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 9(4), pages 359-376, November. [Downloadable!] (restricted)
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  12. 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. [Downloadable!] (restricted)
  13. Salehizadeh, Mehdi & Taylor, Robert, 1999. "A test of purchasing power parity for emerging economies," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 9(2), pages 183-193, April. [Downloadable!] (restricted)
  14. Baum, Christopher F. & Barkoulas, John T. & Caglayan, Mustafa, 2001. "Nonlinear adjustment to purchasing power parity in the post-Bretton Woods era," Journal of International Money and Finance, Elsevier, vol. 20(3), pages 379-399, June. [Downloadable!] (restricted)
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  15. Charles Engel & Michael K. Hendrickson & John H. Rogers, 1997. "Intra-National, Intra-Continental, and Intra-Planetary PPP," NBER Working Papers 6069, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  16. Sarno, Lucio, 2000. "Real exchange rate behavior in the Middle East: a re-examination," Economics Letters, Elsevier, vol. 66(2), pages 127-136, February. [Downloadable!] (restricted)
  17. Azali, M. & Habibullah, M. S. & Baharumshah, A. Z., 2001. "Does PPP hold between Asian and Japanese economies? Evidence using panel unit root and panel cointegration," Japan and the World Economy, Elsevier, vol. 13(1), pages 35-50, January. [Downloadable!] (restricted)
  18. Cuddington, John T. & Liang, Hong, 2000. "Purchasing power parity over two centuries?," Journal of International Money and Finance, Elsevier, vol. 19(5), pages 753-757, October. [Downloadable!] (restricted)
  19. W. A. Broock & J. A. Scheinkman & W. D. Dechert & B. LeBaron, 1996. "A test for independence based on the correlation dimension," Econometric Reviews, Taylor and Francis Journals, vol. 15(3), pages 197-235. [Downloadable!] (restricted)
  20. Venus Khim-Sen Liew & Terence Tai-Leung Chong & Kian-Ping Lim, 2003. "The inadequacy of linear autoregressive model for real exchange rates: empirical evidence from Asian economies," Applied Economics, Taylor and Francis Journals, vol. 35(12), pages 1387-1392, August. [Downloadable!] (restricted)
  21. Jun Nagayasu, 1998. "Does the Long-Run PPP Hypothesis Hold for Africa? Evidence from Panel Co-Integration Study," IMF Working Papers 98/123, International Monetary Fund.
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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Nikolaos Giannellis & Athanasios Papadopoulos, 2005. "Estimating the Equilibrium Effective Exchange Rate for Potential EMU members," Working Papers 0719, University of Crete, Department of Economics, revised 08 Mar 2007. [Downloadable!]
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  2. Nikolaos Giannellis & Athanasios P. Papadopoulos, 2007. "Purchasing Power Parity among developing countries and their trade-partners. Evidence from selected CEECs and Implications for their membership of EU," Money Macro and Finance (MMF) Research Group Conference 2006 55, Money Macro and Finance Research Group. [Downloadable!]
    Other versions:
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