“…The first group examined a sample of uniquely IBs from different countries (Yudistira, 2004;Hassan 2005Hassan , 2006Sufian, 2009;Viverita et al, 2007) or from one single country (Hassan & Hussein, 2003;Saaid et al, 2003;Saaid, 2005;Kamaruddin et al, 2008). The second group of studies used a comparative approach and can be divided according to the obtained results: studies showing the absence of any difference between IBs and CBs in terms of efficiency (Abdul-Majid et al, 2005;El-Gamal & Inanoglu, 2005;Mokhtar et al, 2006;Bader, 2008;Hassan et al, 2009;Shahid et al, 2010); other studies did not test the significance of the difference in efficiency between the IBs and CBs for lack of observations (Hussein, 2004;Al-Jarrah & Molyneux, 2005;Said, 2012); while few studies have shown a higher efficiency of IBs compared to CBs (Yudistira, 2004;Masruk & al., 2007;Al-Muharrami, 2008;Zahoor et al, 2011); and some other studies attested for the pre-eminence of CBs in terms of efficiency (Hassan, 2006;Mokhtar et al, 2007Mokhtar et al, , 2008Safiullah, 2010;Sraïri, 2010).…”