Local persistence and the PPP hypothesis

Local persistence and the PPP hypothesis,10.1016/j.jimonfin.2009.07.006,Journal of International Money and Finance,Soyoung Kim,Luiz Renato Lima

Local persistence and the PPP hypothesis  
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This paper examines the statistical properties of the bilateral real exchange rates of the U.S. vs. France, Germany, and the U.K. during the Post-Bretton-Woods period, and draws implications on the Purchasing Power Parity (PPP) hypothesis. Contrary to traditional studies that consider only unit root and stationary processes to describe the real exchange rate behavior, this paper considers an in-between process, the locally persistent process. The empirical results demonstrate the following two findings: (1) Locally persistent processes describe the real exchange rate movements better than unit root and stationary processes, which implies that PPP reversion occurs and PPP holds in the long-run. (2) The confidence intervals for half-life deviations from PPP under local persistence tend to be narrower than those obtained by assuming the ADF and the local-to-unity models.
Journal: Journal of International Money and Finance - J INT MONEY FINAN , vol. 29, no. 3, pp. 555-569, 2010
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