1. First two authors respectively economists, Economic Development and Research Department, Industrial Development Corporation, PO Box 784055, Sandton 2146, Republic of South Africa and Professor, Centre for Regional Development and Department of Economics, Potchefstroom University, Private Bag X6001, Potchefstroom 2520, Republic of South Africa. The authors would like to thank the Industrial Development Corporation for its support of this research as well as the Department of Economics at the University of...