Alexandre Loures Federal University of Vicosa   Rua Ribeiro Bastos, 38 Sao Joao del Rei, Minas Gerais 36307-354 Brazil   alexandre.loures@ymail.com   http://www.rodriguesloures.com           JEL Areas: F1 : Trade: General F4 : Macroeconomic Aspects of International Trade and Finance: General