Affiliation: | 1. School of Management, Politecnico di Milano, Italy;2. Department of Management and Production Engineering, Politecnico di Torino, Italy;3. BRIC, Collegio Carlo Alberto, Italy;4. Andrew Young School of Policy Studies, Georgia State University GA, United States;5. NBER, United States;6. Department of Economics, Cognetti De Martiis, Università di Torino, Italy |