1. Stephen M. Ross School of Business, University of Michigan, Ann Arbor, Michigan 48109, USA;
2. Department of Business and Management, LUISS Guido Carli, 00197 Roma, Italy;
3. Department of Communication and Economics, University of Modena and Reggio Emilia, 42121 Reggio Emilia, Italy;
4. Business School, University of Roehampton, London SW15 5SL, United Kingdom;