“…Despite the numerous studies focusing on banking efficiency and productivity using DEA (Berger & Humphrey, 1992;Berger & Humphrey, 1997;Fukuyama & Weber 2009a, b, 2010Holod and Lewis, 2011;Sufian, 2010), an in-depth analysis of banks in Africa is still missing (O'Donnell & Westhnizen, 2002;Azam, Biais, & Dia, 2004;Figueira Kirkpatrick et al, 2007;Okeahalam, 2008;Ikhide, 2008;Kiyota, 2009;Assaf et al, 2010;Kebede and Wassie, 2013), thus indicating a literature gap. The situation contrasts with the extensive research that has been carried out on American banks (Berger, et al, 1987;Bauer, et al 1993;Berger & Humphrey, 1997), on European banks (Barros et al, 2007;Barros et al, 2009;Williams et al, 2010;Kontolaimou & Tsekouras, 2010), Asian banks (Berger et al, 2009;Chen et al, 2005;Kumbhakar & Wang, 2005;Assaf et al 2010;Barros et al, 2010;Barros et al, 2012), and even South American banks (Staub, Souza, & Tabak, 2010;Wanke & Barros, 2014).…”