Amanfo SE. Total Factor Productivity Growth of Ghanaian Electricity Distribution Utilities Using Data Envelopment Analysis and Malmquist Index (2000–2020). JEFAS [Internet]. 2021 Dec. 25 [cited 2025 Aug. 7];3(2):233-48. Available from: https://al-kindipublishers.org/index.php/jefas/article/view/2559