Estimation of Shadow Prices for Project Evaluation in Pakistan. The Pakistan Development Review, [S. l.], v. 18, n. 2, p. pp.129–145, 1979. DOI: 10.30541/v18i2pp.129-145. Disponível em: https://thepdr.pk/index.php/pdr/article/view/519. Acesso em: 26 oct. 2025.