1. Research Center in Business Science (NECE) Covilhã, University of Beira Interior, Covilha, Portugal
2. University of Beira Interior, Covilhã; ISCTE-IUL, BRU-IUL, Lisboa, Portugal
3. CeBER, Faculty of Economics, University of Coimbra, Coimbra, Portugal
4. CIICESI, Escola Superior de Tecnologia e Gestão, Politécnico Do Porto, Porto, Portugal