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...

Does the termination probability of a business expansion or contraction increase with age? This question may be formally addressed by analyzing the nature of duration dependence in aggregate economic activity. The author's null hypothesis is that there is no duration dependence, which they test...