First Author:   Matias Fontenla University of New Mexico fontenla@unm.edu   Department of Economics, MSC05 3060, 1 UNM Albuquerque, 87131-0001, USA   505 277 6458(Phone) 505 277 6458(Fax) Second Author: Fidel Gonzalez Sam Houston State University fidel_gonzalez@shsu.edu