An Unbiased Appraisal of Purchasing Power Parity /

Univariate studies of the hypothesis of unit roots in real exchange rates have yielded consensus point estimates of the half-life of deviations from purchasing power parity of between three to five years. However, least squares-based estimates of half-lives are biased downward. Accordingly, we follo...

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Автор: McDermott, C.
Інші автори: Cashin, Paul
Формат: Журнал
Мова:English
Опубліковано: Washington, D.C. : International Monetary Fund, 2001.
Серія:IMF Working Papers; Working Paper ; No. 2001/196
Онлайн доступ:Full text available on IMF
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245 1 3 |a An Unbiased Appraisal of Purchasing Power Parity /  |c C. McDermott, Paul Cashin. 
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520 3 |a Univariate studies of the hypothesis of unit roots in real exchange rates have yielded consensus point estimates of the half-life of deviations from purchasing power parity of between three to five years. However, least squares-based estimates of half-lives are biased downward. Accordingly, we follow Andrews (1993) and use median-unbiased estimators of the half-life of deviations from parity as a preferred measure of the persistence of real exchange rate shocks. We study this issue using real effective exchange rate (REER) data for 22 industrial countries in the post-Bretton Woods period. Three methods of bias correction are implemented, which yield cross-country averages of half-lives of deviations from parity ranging between 4 to 15 years, with the REER of several countries displaying permanent deviations from parity. 
538 |a Mode of access: Internet 
700 1 |a Cashin, Paul. 
830 0 |a IMF Working Papers; Working Paper ;  |v No. 2001/196 
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