Effectiveness Analysis of Agricultural Protection Policy on Food Supply, Export and Farmer-Welfare in Nigeria: Generalized Method of Moment Approach. American International Journal of Agricultural Studies , [S. l.], v. 1, n. 1, p. 38–59, 2018. DOI: 10.46545/aijas.v1i1.4. Disponível em: https://acseusa.bdtopten.com/index.php/aijas/article/view/4. Acesso em: 1 feb. 2026.