Castañeda Sabido, Alejandro, and David Mulato. “Market Structure: Concentration and Imports As Determinants of Industry Margins”. Estudios Económicos de El Colegio de México 21, no. 2 (July 1, 2006): 177–202. Accessed April 20, 2024. https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/154.