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First Author:
 
Cleomar Gomes da Silva
Federal University of Uberlandia, Institute of Economics (IERI-UFU), Brazil
cleomargomes@gmail.com
 
 
 
 

Second Author:

Gilberto O. Boaretto
Department of Economics, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Brazil
gilbertoboaretto@hotmail.com