Impact of additional royalties and taxes on export prices of Nigerien petroleum products: Evidence based on estimates of ad valorem tariff equivalents. African Social Sciences Journal, [S. l.], v. 1, n. 01, p. 001–027, 2025. DOI: 10.5281/zenodo.16421559. Disponível em: https://africansocialsciencesjournal.com/index.php/Index/article/view/1. Acesso em: 19 sep. 2025.