1
   
3
Published: Hamburg, HWWI Institute of International Economics, 2009
   
5
Published: Hamburg, HWWI Institute of International Economics, 2008
   
6
Published: Hamburg, HWWI Institute of International Economics, 2008
   
9
   
15
Published: Nürnberg, Inst. für Arbeitsmarkt- und Berufsforschung der Bundesagentur für Arbeit, 2005
   
16
Published: Köln, Max-Planck-Inst. für Gesellschaftsforschung, 2008
   
20
   

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