1. Instituto Superior de Economia e Gestão; Technical University of Lisbon and UECE (Research Unit on Complexity and Economics) and CESA (Center for African and Development Studies); Lisbon Portugal
2. IAE; Université de Perpignan Via Domitia; 52 avenue Paul Alduy Perpignan 66860 France
3. University of Perpignan Via Domitia; CAEPEM, IAEz Perpignan Cedex France