Willingness to Pay for Walking Tractor: Evidence from smallholder farmer’s in Northwestern Ethiopia. Ethiopian Journal of Economics, [S. l.], v. 31, n. 1, p. 101–121, 2022. Disponível em: https://ethiopianjournalofeconomics.org/index.php/EJE/article/view/241.. Acesso em: 24 jun. 2026.