We investigate two alternative versions of Purchasing Power Parity (PPP): reversion to a constant mean in the spirit of Cassel and reversion to a constant trend in the spirit of Balassa and Samuelson, using long-span real exchange rate data for industrialized countries. We develop unit root tests that both account for structural change and maintain a long-run mean or trend. With conventional tests, previous research finds evidence of some variant of PPP for 9 of the 16 countries. With the unit root tests in the presence of restricted structural change, we find evidence of PPP for five additional countries.
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Volume (Year): 38 (2006) Issue (Month): 5 (August) Pages: 1329-1349 Download reference. The following formats are available: HTML
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