Victor L. P. Alves Federal University of Sao Carlos   UFSCAR-Sorocaba Campus Economics Department Rod. J.L. Santos, km 110 - SP 264, Bairro Itinga Sorocaba, SP 18052780 Brazil   victor.pedrosoalves@gmail.com             JEL Areas: C0 : Mathematical and Quantitative Methods: General C1 : Econometric and Statistical Methods: General