1. Department of Management, Economics, and Industrial Engineering, Politecnico di Milano, 20133 Milan, Italy;
2. Max Planck Institute for Innovation and Competition, 80539 Munich, Germany;
3. School of Management, University of Bath, Bath BA27AY, United Kingdom;
4. Department of Strategy and Innovation, Copenhagen Business School, 2000 Frederiksberg, Denmark;
5. Strategic Management Department, IESE Business School, University of Navarra, 08034 Barcelona, Spain