1. Lisbon School of Economics and Management (ISEG), University of Lisbon, Rua do Quelhas 6, Lisboa 1200-781, Portugal; e-mail: joaojalles@gmail.com
2. Research in Economics and Mathematics (REM) and Research Unit on Complexity and Economics (UECE), Universidade de Lisboa-ISEG, Rua Miguel Lupi 20, Lisbon 1249-078, Portugal
3. Economics for Policy, Universidade Nova de Lisboa-Nova School of Business and Economics, Rua da Holanda 1, Carcavelos 2775-405, Portugal
4. IPAG Business School, 184 Boulevard Saint-Germain, Paris 75006, France
5. Department of Economics, University of Illinois at Chicago, 601 S. Morgan St. UH 725, Chicago, IL 60607-712, USA