RODRÍGUEZ GARCÍA, Juan Manuel; MEDINA CUELLAR, Sergio Ernesto; SÁNCHEZ JIMÉNEZ, Marco Antonio. Determination of the poverty threshold in Guanajuato: an innovative approach using Engel’s law and the second derivative criterion. Acta Universitaria, [S. l.], v. 36, p. 1–17, 2026. DOI: 10.15174/au.2026.4564. Disponível em: https://www.actauniversitaria.ugto.mx/index.php/acta/article/view/4564. Acesso em: 9 may. 2026.