1. Research on Economics, Management and Information Technologies, REMIT, Portucalense University, 4200-072 Porto, Portugal
2. NECE-UBI—Research Unit in Business Sciences, University of Beira Interior, Estrada do Sineiro, s/n, 6200-209 Covilhã, Portugal
3. Miguel Torga Institute of Higher Education, Largo Cruz de Celas nº1, 3000-132 Coimbra, Portugal