First Author:   Fernando Seabra Federal University of Santa Catarina seabra@cse.ufsc.br   Federal University of Santa Catarina, Department of Economics Florianopolis, 88049-970, Brazil   55 48 331-6624(Phone) 55 48 331-6624(Fax) http://www.cse.ufsc.br/~gecon Second Author: Lisandra Flach Universität Stuttgart lisandraflach@yahoo.com.br   IPA-Fraunhofer Institut, Universität Stuttgart, Nobelstrasse 12 Stuttgart, Germany