“…First, although many studies investigate the relationship among commercial banks' non-interest income, profitability, and risk using financial ratios (DeYoung and Rice, 2004;Stiroh, 2004;Lepetit et al, 2008), few papers examine the extent to which non-interest income businesses affect profit and risk efficiencies. Since the seminar paper by Aigner et al (1977), stochastic frontier analysis measuring efficiency has become state-of-the-art for comparing the performance of production units.…”