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Are Real Exchange Rates Nonstationary? Evidence from a Panel-Data Test

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  • Wu, Yangru

Abstract

It is well documented that real exchange rates between the United States and many industrialized countries in the post-Bretton Woods period are integrated. This result implies that purchasing power parity (PPP) does not hold even as a long run relationship. This paper demonstrates that the failure to reject the unit-root hypothesis may result from the low power of existing univariate test procedures. I test for unit roots in real exchange rates by employing a more powerful panel-based procedure. Using both CPI and WPI real dollar exchange rate data, I strongly reject the null hypothesis of a unit root. My results provide overwhelming support for the long-run PPP under the current float. Copyright 1996 by Ohio State University Press.

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  • Wu, Yangru, 1996. "Are Real Exchange Rates Nonstationary? Evidence from a Panel-Data Test," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 28(1), pages 54-63, February.
  • Handle: RePEc:mcb:jmoncb:v:28:y:1996:i:1:p:54-63
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