Essay on income inequality in the Brazilian Northeast in light of the hypothesis of Kuznets and N in 1991, 2000 and 2010. Research, Society and Development, [S. l.], v. 11, n. 15, p. e281111536762, 2022. DOI: 10.33448/rsd-v11i15.36762. Disponível em: https://rsdjournal.org/rsd/article/view/36762. Acesso em: 5 dec. 2025.