For univariate time series we suggest a new variant of efficient score tests against fractional alternatives. This test has three important merits. First, by means of simulations we observe that it is superior in terms of size and power in some situations of practical interest. Second, it is...

A high degree of cyclical synchronization between the new EU member states (NMS) from Central and Eastern Europe and the euro area is generally seen as a prerequisite for successful EMU enlargement. We establish stylized facts on economic linkages between NMS and the euro area using dynamic...