We test the purchasing power parity hypothesis for the Mexican peso/US dollar real exchange rate using monthly data for 1969–2010. Results suggest that the real exchange rate reverts to a changing mean. These mean shifts can be explained by liberalization policies implemented during the 1980s...

This appendix presents an extended explanation for our finding of mean reversion of the real exchange rate to a shifting mean using monthly data for Mexico, 1969-2010. Because such shifts coincide with trade liberalization in Mexico, we conclude that changes in the tradable/nontradable goods...

We show that the use of the real effective exchange rate to test for purchasing power parity, as in Astorga (2012) and other studies, introduces a bias against finding evidence of PPP. The bias is illustrated using unit root tests applied to bilateral real rates.