AL-ZAWBAEE, Obaid M.; MAHMOOD, Nozad H. Building an Efficient Model by Using Panel Data. Cihan University-Erbil Journal of Humanities and Social Sciences, [S. l.], v. 7, n. 1, p. 82–87, 2023. DOI: 10.24086/cuejhss.v7n1y2023.pp82-87. Disponível em: https://journals.cihanuniversity.edu.iq/index.php/cuejhss/article/view/827. Acesso em: 16 jun. 2026.