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A re-examination on dissecting the purchasing power parity puzzle


  • Wu, Jyh-Lin
  • Lee, Chingnun
  • Wang, Tzu-Wei


The purpose of this paper is to examine the source of a real exchange-rate adjustment based on the impulse-response function constructed from local projections when the true data-generating process (DGP) is unknown. This work extends the local-projection method proposed by Jordà [2005. Estimation and inference of impulse responses by local projections. American Economic Review 95, 161-182] to allow for variables that are I(1) and exhibit cointegration. Our paper shows that nominal exchange-rate adjustments dominate in the reversion toward PPP regardless of a nominal exchange-rate shock or a price shock. It is also shown that the half-life of real exchange rates is close to that of nominal exchange rates. Since these results are consistent with those of Cheung et al. [Cheung, Y.W., Lai, K.S., Bergman, M., 2004. Dissecting the PPP puzzle: the unconventional roles of nominal exchange rate and price adjustments. Journal of International Economics 64, 135-150], we therefore conclude that their main findings are robust to possible misspecifications in the true DGP.

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  • Wu, Jyh-Lin & Lee, Chingnun & Wang, Tzu-Wei, 2011. "A re-examination on dissecting the purchasing power parity puzzle," Journal of International Money and Finance, Elsevier, vol. 30(3), pages 572-586, April.
  • Handle: RePEc:eee:jimfin:v:30:y:2011:i:3:p:572-586

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    References listed on IDEAS

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    Cited by:

    1. EPHREM HABTEMICHAEL REDDA & Paul-Francious Muzindusti, 2017. "Does SADC constitute an optimum currency area? Evidence from generalised purchasing power parity," Proceedings of Economics and Finance Conferences 4807771, International Institute of Social and Economic Sciences.
    2. 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.


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