1. Department of Economics and Business Administration, Friedrich-Schiller University Jena, Jena, Germany
2. Department of Marketing and Management, University of Southern Denmark, Odense, Denmark.
3. Centre for Evidence-based Policy Advice, Halle Institute for Economic Research, Halle, Germany.
4. Department Structural Change and Productivity, Halle Institute for Economic Research, Halle, Germany.
5. Faculty of Business Studies and Economics, University of Bremen, Bremen, Germany.
6. Faculty of Business Studies and Economics, University of Bremen, Bremen, Germany. ,