“…Several types of efficiencies were investigated; namely, overall technical efficiency (OTE), as estimated by CCR models (e.g., Yudistira, 2004;Johnes et al, 2009;Kaffash et al, 2018;Wanke et al, 2019;Alsharif, 2021), pure technical efficiency (PTE), as estimated by BCC models (e.g., Grigorian and Manole, 2005;Hassan, 2006;Sufian and Habibullah, 2010;Kaffash et al, 2020), scale efficiency (SE), as measured by the ratio of OTE to PTE (e.g., Hassan, 2006;Mobarek and Kalonov, 2014;Belanès et al, 2015;Shahwan and Habib, 2021), cost efficiency (CE), as estimated by cost-based objective DEA models (e.g., Hassan, 2006;Mokhtar et al, 2007;Johnes et al, 2014;Anagnostopoulos et al, 2020), revenue efficiency (RE), as estimated by revenue-based objective DEA models (e.g., Hassan, 2006;Al-Khasawneh et al, 2012;Kamarudin et al, 2014;Alsharif, 2021), profit efficiency (PE), as estimated by profit-based objective DEA models (e.g., Hassan, 2006;Sufian et al, 2013;Alqahtani et al, 2017), and allocative efficiency (AE), as measured by the ratio of CE to OTE (e.g., Ahmad and Luo, 2010;Batir et al, 2017). The distribution of the 80 DEA studies on Islamic banking covering each of these efficiency measures is depicted in Figure (b) in Appendix A, which suggest that these studies on Islamic banking are well diversified in that they respond to the informational needs of a variety of stakeholders including managers, investors, and regulators.…”