By disaggregating price indices, it becomes apparent that the real exchange rate consists of the real exchange rate for a single good and a weighted sum of relative prices between goods. When applying a battery of panel unit root tests to this sum and its components, it is found that both the...

Die 1990 eingeführte Wirtschafts- und Währungsunion der BRD mit der DDR und schließlich die deutsche Wiedervereinigung war und ist für jede Statistik, die versucht die Lebensverhältnisse in Ost und West zu vergleichen, eine große Herausforderung. In seinem einleitenden Teil dokumentiert...

Versucht man für Deutschland die Preisniveauunterschiede zu einem gegebenen Zeitpunkt kleinräumig zu untersuchen, so stellt man schnell fest, dass hierzu keine ausreichenden Informationen verfügbar sind. Im System der deutschen amtlichen Preisstatistik, aber nicht nur hier, besteht damit eine...

Real exchange rates are quite persistent. Standard unit root tests are not very powerful in drawing a conclusion regarding the validity of purchasing power parity [PPP]. Rather than asking if PPP holds throughout the whole sample period, we examine if PPP holds sometimes by employing...

We test for mean reversion in real exchange rates using a recently developed unit root test for non-normal processes based on quantile autoregression inference in semi-parametric and non-parametric settings. The quantile regression approach allows us to directly capture the impact of different...

In this paper we present a critical overview of differnt methods of constructing an equilibrium exchange rate. The recent literature on purchasing power parity (PPP) indicates that on its own PPP is not a good vehicle for defining an equilibrium exchange rate. Rather, we argue that the latter...

In this paper we show the consequences of applying a panel unit root test when testing for a purchasing power parity relationship. The distribution of the tests investigated, including the IPS test of Im et al (1997), are influenced by a common stochastic trend which is usually not accounted...

We examine the asymptotic behavior of unit root tests against nonlinear alternatives of the exponential smooth transition type if the data is erroneously nonlinearly transformed. We show analytically and by a Monte Carlo study that the probability of rejecting the correct null of a random walk...