1. Business School, University of Mannheim, 68131 Mannheim, Germany;
2. Department of Strategy and Innovation, Copenhagen Business School, 2000 Frederiksberg, Denmark;
3. Max Planck Institute for Innovation and Competition, 80539 Munich, Germany;
4. Department of Management and Technology, Bocconi University, 20136 Milan, Italy;
5. ICRIOS (Invernizzi Center for Research on Innovation, Organization, Strategy and Entrepreneurship), Bocconi University, 20136 Milan, Italy