1. Department of Economics and Management, University of Ferrara, Italy and Ministry of Education, Rome, Italy
2. General Directorate for Knowledge, Labour and Enterprise Economy, Emilia-Romagna Region, Bologna, Italy
3. Department of Economics and Management, University of Ferrara, Ferrara, Italy
4. Department of Economics “Marco Biagi” and RECent, University of Modena and Reggio Emilia, Modena, Italy
5. Department of Economics “Marco Biagi”, University of Modena and Reggio Emilia, Modena, Italy