[1] Univ Beira Interior, Dept Management, Covilha, Portugal
[2] Univ Aveiro, Dept Econ Management & Ind Engn, Aveiro, Portugal
[3] Polytech Inst Coimbra, Coimbra Business Sch, ISCAC, Higher Inst Accountancy & Adm Coimbra, Coimbra, Portugal
[4] Univ Tras Os Montes & Alto Douro, Vila Real, Portugal
[5] Univ Beira Interior, Dept Management & Econ, Covilha, Portugal
[6] Polytech Inst Viseu, Dept Management, Viseu, Portugal
[7] Univ Beira Interior, Res Ctr Business Sci, Covilha, Portugal