1. Department of Economics, Federal University of Sergipe, São Cristóvão, Brazil
2. Computer Modeling Program, SENAI Cimatec, Salvador, Brazil
3. Department of Vocational Education, Federal Institute of Maranhão, Bacabal, Brazil
4. Department of Economics, Federal University of Juiz de Fora, Campus Universitário, Juiz de Fora, Brazil
5. State University of Bahia, Salvador, Brazil