earticle

영어

This study is to investigate Korean bank efficiency from 2004 to 2010 by window data envelopment analysis with a window width of 3 years. Number of employees, number of branches, and total deposits are employed as inputs, and total loans, and securities output for window DEA analysis. From the efficiency for a particular year compared against the different windows, we can conclude a consistent upward shifting in efficient frontier since the efficiency for a given year decreases when the efficient frontier forwards. This fact indicates that some banks pushed the efficient frontier by technical innovations. In addition, average efficiency scores consistently increase with up and down trends. In addition, window analysis shows that Hankook City is the most efficient bank out of 13 and Kyong Nam is the most efficient out of the regional banks.