Purchasing power parity is one of the most important equilibrium conditions in international macroeconomics. Empirically, it is also one of the most hotly contested. Numerous recent studies, for example, have sought to determine the validity of purchasing power parity using data from the...

In this paper, the authors assert that most studies that have sought to determine the validity of purchasing power parity are flawed for two reasons. First, post-1973 data contain, by definition, only a very limited amount of the low-frequency information relevant for examination of long-run...