1. Doctoral School of Economics and Regional Sciences, Hungarian University of Agriculture and Life Sciences, 2100 Godollo, Hungary
2. Department of Economics, School of Business and Economics, Madda Walabu University, Robe 247, Ethiopia
3. Department of Natural Resources Management, Kebri Dehar University, Kebri Dehar 250, Ethiopia
4. Institute of Agricultural and Food Economics, Hungarian University of Agriculture and Life Sciences, Georgikon Campus, 8360 Keszthely, Hungary