GARCÍA NÚÑEZ, Luis. IV Estimation with weak instruments: an application to the determinants of school attainment in Peru. Economia, [S. l.], v. 31, n. 62, p. 127–146, 2008. DOI: 10.18800/economia.200802.006. Disponível em: https://revistas.pucp.edu.pe/index.php/economia/article/view/1194. Acesso em: 12 dec. 2025.