Noting that many economic variables display occasional shifts in their second order moments, we investigate the performance of homogenous panel unit root tests in the presence of permanent volatility shifts. It is shown that in this case, panel unit root tests derived under time invariant...

The paper surveys the recent theoretical and empirical literature on the economic determinants of interregional labor migration. In the first part, theoretical approaches are outlined, in the second part, results of several empirical investigations are surveyed. The authors conclude that...

Die Herausforderung: Steigender Anpassungsdruck durch die Globalisierung der Märkte Die Globalisierung der Märkte wird in Europa vor allem deswegen als schmerzhaft empfunden, weil sie mehr Flexibilität auf den besonders geschützten Arbeitsmärkten erfordert. Unter Druck geraten vor allem...

In international aviation, global strategic alliances (GSAs) have in recent years become an important form of cooperation between airlines. This cooperation has hit the antitrust nerve of the European Commission. Initially, the Commission had attempted to constrain both the market share of the...