1. Department of Agricultural Economics, Ghent University, Coupure links 653, B-9000 Ghent, Belgium
2. Department of Agricultural Economics, Ghent University, Coupure links 653, B-9000 Ghent, Belgium / School of Business, Federal University of Rio Grande do Sul, Rua Washington Luiz 855, 90010-460,Porto Alegre, RS, Brazil
3. Department of Marketing and Entrepreneurship, Mzumbe University, P.O. Box 6 Mzumbe, Morogoro, Tanzania