Panel data framework has often been used to build Early Warning Systems for financial crises. This paper questions the implicit assumption that crises are homogenously caused by identical factors. It suggests a preliminary step aiming at forming optimal country clusters.

This paper deals with the analysis of the inflation rate in South Africa for the time period 1970M1-2008M12. We use long range dependence techniques and the results show that inflation in this country is a covariance stationary process with long range dependence, with an order of integration...

This paper presents a cyclical model for unemployment and entrepreneurship. The estimated periodicity of the cycles for the US, the UK, Spain and Ireland is between 5 and 10 years, and the orders of integration are smaller (greater) than 1 if the underlying disturbances are autocorrelated...