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Determinant of Tax Revenue Effort in Sub-Saharan African Countries: A Stochastic Frontier Analysis. International Journal of Sustainable Development & World Policy, [S. l.], v. 9, n. 1, p. 47–71, 2020. DOI: 10.18488/journal.26.2020.91.47.71. Disponível em: https://archive.conscientiabeam.com/index.php/26/article/view/2070. Acesso em: 22 jul. 2026.