Emmalia Zachwa. Natural Monopoly and Tariff Regulation of Drinking Water Companies: A Theoretical Analysis from a Public Economics Perspective. al. kharaj. j. islam. econ. bus. [Internet]. 2026 Nov. 5 [cited 2026 Nov. 5];8(4). Available from: https://ejournal.iainpalopo.ac.id/index.php/alkharaj/article/view/12941