First Author:   Fábio Gomes University of São Paulo, Department of Economics, FEA-RP fabiogomes@fearp.usp.br   Av. Bandeirantes 3900, Monte Alegre Ribeirão Preto, 14040-905, Brazil   55 (16) 3602-3839(Phone) 55 (16) 3602-3839(Fax) Second Author: Lourenço Paz Syracuse University lspaz@maxwell.syr.edu   Syracuse, 13244, USA   (1) 315 443-5874(Phone)