1. Dondena Centre for Research on Social Dynamics and Public Policy Bocconi University Milano Italy
2. Department of Social and Political Sciences Bocconi University Milano Italy
3. University of Turin Torino Italy
4. Collegio Carlo Alberto Torino Italy
5. Department of Economics and Statistics ‘S. Cognetti de Martiis’ University of Turin, Campus Luigi Einaudi Lungodora Siena 100A Torino 10153 Italy