[1] Univ Aveiro, DEGEIT Dept Econ Management Ind Engn & Tourism, Campus Univ Santiago, P-3810193 Aveiro, Portugal
[2] GOVCOPP Res Unit Governance Competitiveness & Pub, Campus Univ Santiago, P-3810193 Aveiro, Portugal
[3] Univ Porto, INESCTEC Inst Syst & Comp Engn Technol & Sci, Campus Fac Engn,Rua Dr, P-4200465 Porto, Portugal
[4] Univ Porto, Fac Econ, Rua Dr Roberto Frias, P-4200465 Porto, Portugal
[5] Univ Beira Interior, NECE UBI Res Ctr Business Sci, P-6200209 Covilha, Portugal