MARMEN, J.; KUSUMA, A. S. Cost Observation in Natural Monopoly Settings: The Relevance of Jean-Jacques Laffont and Jean Tirole’s Thoughts in The Regulation of Natural Monopoly Companies. International Journal of Economics Development Research (IJEDR), [S. l.], v. 4, n. 5, p. 2619–2627, 2023. DOI: 10.37385/ijedr.v5i2.5504. Disponível em: https://journal.yrpipku.com/index.php/ijedr/article/view/5504. Acesso em: 23 jul. 2025.