Mayer Foulkes, David, and Edson Enrique Serván Mori. “Formation of Cognitive Capacity in Mexico: Economic and Public Policy Impacts”. Estudios Económicos de El Colegio de México (January 1, 2009): 83–122. Accessed April 23, 2024. https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/383.