“…Indeed, the majority of previous studies on the efficiency of Islamic banks have used the intermediation approach (Yudistira [19], Sufian and Nour [20], Mobarek and Kalonov [37], Aghimien et al [22], etc.). Given this, in our study, we adopt the intermediation approach, according to which, MENA Islamic banks are considered as financial intermediaries that produce two outputs: total loans (Y1), which include Murabaha and deferred sales, Ijara (leasing and hire purchase), Mudarabah (profit-sharing) and Musharakah (partnership); and other earning assets (Y2), which include investments in companies, securities, properties and real estate.…”