1. School of Management and Technology, Santarém Polytechnic University, Complexo Andaluz, Apartado 295, 2001-904 Santarém, Portugal
2. Center for Advanced Studies in Management and Economics (CEFAGE), University of Évora, 7000-809 Évora, Portugal
3. Center for African and Development Studies, Lisbon University, 1200-781 Lisbon, Portugal