KHAN, A.; KHAN, H. Return to Education and Endogeneity Bias: A Study Of Higher Education Institutions in Khyber Pakhtunkhwa, Pakistan. Pakistan Journal of Social Sciences, [S. l.], v. 40, n. 2, p. 603-614, 2020. Disponível em: https://pjss.bzu.edu.pk/index.php/pjss/article/view/869. Acesso em: 14 feb. 2026.