This study applies a group of unit root and stationarity tests to study the hypothesis of Purchasing Power Parity in ten Mediterranean countries. The real effective exchange rate with the European Union turns out to be stationary for five of the countries analysed, once the presence of...

The aim of this article is to provide additional evidence on the fulfilment of the Purchasing Power Parity (PPP) hypothesis in the so-called Mediterranean countries. In order to test for the empirical validity of such a hypothesis, we have applied two types of unit root tests. The first group is...

In this paper, we test for convergence in the environmental performance of a sample of OECD countries, with data ranging from 1971 to 2002. First, we use Data Envelopment Analysis (DEA) to compute two environmental performance indicators (EPIs) in the production theory framework. Second, we...