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Long-Run PPP May Not Hold After All.
Engel, C., (1996)
Unit Root Tests in the presence of Uncertainty about the Non-Stochastic Trends.
Ayat, L., (1996)
Regression-Based Seasonal Unit Root Tests with Recursive Mean Adjustment.
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.