OLEA HERNÁNDEZ, H. A. The participation of Mexican undocumented immigrants in the United States: A Tobit model of simultaneous equations. Estudios Económicos de El Colegio de México, [S. l.], v. 5, n. 1, p. 83–123, 1990. DOI: 10.24201/ee.v5i1.332. Disponível em: https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/332. Acesso em: 26 may. 2024.