Aroche Reyes, Fidel. “Technical and Structural Changes. The Hypothesis of Decreasing Coefficients. Statistical Tests With Data for Mexico”. Estudios Económicos de El Colegio de México 10, no. 2 (July 1, 1995): 147–162. Accessed May 5, 2024. https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/267.