1. ISEG/UL – Universidade de Lisboa, R. Miguel Lupi 20, Lisbon, 1249-078, Portugal
2. UECE – Research Unit on Complexity and Economics, R. Miguel Lupi 20, Lisbon, 1249-078, Portugal
3. REM – Research in Economics and Mathematics, UECE – Research Unit on Complexity and Economics, R. Miguel Lupi 20, Lisbon, 1249-078, Portugal