A Methodological Note on a Stochastic Frontier Model for the Analysis of the Effects of Quality of Irrigation Water on Crop Yields. The Pakistan Development Review, [S. l.], v. 37, n. 3, p. pp.293–298, 1998. DOI: 10.30541/v37i3pp.293-298. Disponível em: https://thepdr.pk/index.php/pdr/article/view/1534. Acesso em: 25 oct. 2025.