1. Research Centre on Accounting and Taxation, Polytechnic University of Cávado and Ave, 4750-810 Barcelos, Portugal
2. Department of Economy, Sociology and Management, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal
3. Centro de Estudos Organizacionais e Sociais, Instituto Superior de Contabilidade e Administração do Porto, Instituto Politécnico do Porto, 4465-004 Porto, Portugal