Sheepskin Effects in the Returns to Education in a Developing Country. The Pakistan Development Review, [S. l.], v. 30, n. 1, p. pp.1–19, 1991. DOI: 10.30541/v30i1pp.1-19. Disponível em: https://thepdr.pk/index.php/pdr/article/view/978. Acesso em: 26 oct. 2025.