Wiga Ayu Desmanita, Ahmad Syaifullah and Inne Miftah Dewi 2026. Regional Economic Efficiency In South Sumatera, 2024-2025: A DEA Approach. Indonesian Journal of Multidisciplinary Sciences (IJoMS). 5, 1 (May 2026), 659–676. DOI:https://doi.org/10.59066/ijoms.v5i1.2446.