“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), vol. 4, no. 5, Nov. 2023, pp. 2619-27, https://doi.org/10.37385/ijedr.v5i2.5504.