Unit Roots, Nonlinear Cointegration and Purchasing Power Parity

Alfred Haug and Syed A. Basher
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Syed A. Basher: York University

Econometrics from University Library of Munich, Germany

Abstract: We test long–run PPP within a general model of cointegration of linear and nonlinear form. Nonlinear cointegration is tested with rank tests proposed by Breitung (2001). We start with determining the order of integration of each variable in the model, applying relatively powerful DF–GLS tests of Elliott, Rothenberg and Stock (1996). Using monthly data from the post–Bretton Woods era for G–10 countries, the evidence leads to a rejection of PPP for almost all countries. In several cases the price variables are driven by permanent shocks that differ from the ones that drive the exchange rate. Also, nonlinear cointegration cannot solve the PPP puzzle.

JEL-codes: C22 F40 (search for similar items in EconPapers)
Pages: 18 pages
Date: 2004-01-29, Revised 2005-11-16
New Economics Papers: this item is included in nep-ets and nep-ifn
Note: Type of Document - pdf; prepared on Win98; pages: 18
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Working Paper: Unit Roots, Nonlinear Cointegration and Purchasing Power Parity (2005)
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Persistent link: https://EconPapers.repec.org/RePEc:wpa:wuwpem:0401006

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