First Author:   Jude O. Chukwu Department of Economics, University of Nigeria, Nsukka jude.chukwu@unn.edu.ng   University of Nigeria, University of Nigeria Nsukka, Nigeria   +234(0)8035966754(Phone) +234(0)8035966754(Fax) Second Author: Unimke E. Adie Department of Economics, University of Nigeria, Nsukka unimke.adie@unn.edu.ng   Department of Economics, University of Nigeria Nsukka, Nigeria