1. Hamdiyah Alhassan, is at the Department of Agricultural and Resource Economics, University for Development Studies, Tamale, Ghana,
2. Benjamin Musah Abu is at the Department of Economics and Entrepreneurship Development, University for Development Studies, Tamale, Ghana,
3. Paul Kwame Nkegbe (corresponding author) is at the Department of Economics and Entrepreneurship Development, University for Development Studies, Tamale, Ghana.