Who does the shopping?
German time use evidence, 1996 - 2009Wuppertal : Bergische Univ. Wuppertal, 2013
The innovation effect of the energy transition in Germany
an exploratory empirical analysis of firms and their innovation activitiesWuppertal, 2017Specifying formatively measured constructs in endogenous positions in structural equation models
caveats and guidelines for researchersWuppertal : Bergische Univ. Wuppertal, 2014Entrepreneurs embrace competition
evidence from a lab-in-the-field studyWuppertal : Bergische Universität Wuppertal, [2020]