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Long-Run PPP May Not Hold After All.
Engel, C., (1996)
Agreement and Disagreement Between Unit Root Tests.
Boero, K.L.A.G., (1995)
Tests of the Seasonal Unit Root Hypothesis Against Heteroscedastic Seasonal Integration.
Taylor, A.M.R., (1999)
Accounting for U.S. Real Exchange Rate Changes.
A Model of Foreign Exchange Rate Indetermination.
The Long-Run U.S./U.K. real Exchange Rate.