1. Department of Economics, Universidade Federal de Viçosa (UFV), Brazil
2. Department of Economics, Universidade Federal de Ouro Preto (UFOP), Brazil
3. Institute of Human and Social Sciences, Universidade Federal de Viçosa (UFV), Brazil
4. Department of Economics, Universidade Federal de Juiz de Fora (UFJF), Brazil
5. Department of Economics, Universidade Federal de Minas Gerais (UFMG), Brazil