Méndez Ruiz, Andrés, and Raymundo M. Campos Vázquez. “Girl or Boy? A Study on Mexican parents’ Preferences for the Sex of Their Children”. Estudios Económicos de El Colegio de México 28, no. 2 (July 1, 2013): 217–248. Accessed April 19, 2024. https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/80.