1. Higher School of Education and Social Sciences, CI&DEI, Polytechnic of Leiria, Campus 1, Rua Dr. João Soares, Apartado 4045, 2411-901 Leiria, Portugal
2. Dipartimento di Scienze Umane e Sociali, Università degli Studi di Bergamo, P.le Sant’Agostino, 2, 24129 Bergamo, Italy
3. Research on Economics, Management and Information Technologies, Department of Economics and Management, Universidade Portucalense, 4200-027 Porto, Portugal
4. Instituto Superior Miguel Torga, Largo da Cruz de Celas No. 1, 3000-132 Coimbra, Portugal
5. ISEG-UL—Lisbon School of Economics and Management, University of Lisbon, Rua do Quelhas, 6, 1200-781 Lisbon, Portugal