First Author:   Eric Ogunleye University of Calabar, Nigeria erick_oleye@yahoo.com   Department of Economics, University of Ibadan Ibadan, 200001, Nigeria   + 234 8033364036(Phone) + 234 8033364036(Fax) Second Author: Tochukwu Nwachukwu University of Ibadan tochnwach@yahoo.com   Department of Economics, University of Ibadan Ibadan, 200001, Nigeria   + 234 8035388227(Phone)