Ben Slimen, R., Belhaj, F., Hadriche, M. and Ghroubi, M. 2022. BANKING EFFICIENCY: A COMPARATIVE STUDY BETWEEN ISLAMIC AND CONVENTIONAL BANKS IN GCC COUNTRIES. Copernican Journal of Finance & Accounting. 11, 1 (Jun. 2022), 89–106. DOI:https://doi.org/10.12775/CJFA.2022.005.