Innovation, credit constraints, and trade credit
evidence from a cross-country studyWuppertal : Bergische Univ. Wuppertal, 2010
Productivity in German manufacturing firms
does fixed term employment matter?Wuppertal : Bergische Univ. Wuppertal, 2012Temporary agency work and firm competitiveness
evidence from a panel data set of German manufacturing enterprisesWuppertal : Bergische Univ. Wuppertal, 2011