1. Chair of Marketing (MAR), TIME Research Area, School of Business and Economics RWTH Aachen University Aachen Germany
2. Chair of Marketing and Innovation, School of Business, Economics and Information Systems University of Passau Passau Germany
3. Chair of Corporate Management, Institute of Marketing and Management University of Hohenheim Stuttgart Germany
4. Schmalenbach School of Business and Economics, TH Köln – Cologne University of Technology Arts and Sciences Cologne Germany