1. Department of Management, Economics & Industrial EngineeringPolitecnico di Milano School of ManagementMilano Italy
2. Department of Economics and StatisticsUniversity of SalernoFisciano, SA Italy
3. Centre for Labour Economics and Economic Policy (CELPE) ‐ University of SalernoFisciano, SA Italy
4. Department of Economics and Statistics “Cognetti De Martiis”University of Torino, Campus Luigi Einaudi Lungo Dora SienaTorino Italy