This paper analyzes the properties of multivariate tests of purchasing power parity (PPP) that fail to take heterogeneity in the speed of mean reversion across real exchange rates into account. We compare the performance of homogeneous and heterogeneous unit root testing methodologies. The...

Using a new survey data set of matched exchange rate and interest rate expectations for eight currencies relative to the German mark, we examine empirically the relationship between exchange rate returns, "news" and risk premia. "News" on interest differentials enters significantly in equations...