1. Department of Management and Business Administration, University “G. D’Annunzio” of Chieti-Pescara, 65127 Pescara, Italy
2. Faculty of Economics, and Centre for Business and Economics Research (CeBER), University of Coimbra, 3004-531 Coimbra, Portugal
3. Department of Economic Studies, University “G. D’Annunzio” of Chieti-Pescara, 65127 Pescara, Italy