Households’ Willingness to Pay for Improved Tap Water Services in Karachi, Pakistan. The Pakistan Development Review, [S. l.], v. 54, n. 4I-II, p. pp.507–526, 2022. DOI: 10.30541/v54i4I-IIpp.507-526. Disponível em: https://thepdr.pk/index.php/pdr/article/view/2658. Acesso em: 7 jun. 2025.