Study of Efficiency Evaluation of Commercial Banks by Using Sample DEA Method

Data envelopment analysis (DEA) is an important method to evaluate the efficiency of commercial banks, but traditional DEA methods can not reflect decision-makers' preference and the production possibility sets not include information of sample units in the efficiency evaluation of the commercial banks. So we provide a new sample data envelopment analysis method based on Analytic Hierarchy Process (AHP) to evaluate the efficiency of commercial banks. Firstly, the definitions of SADEA-efficiency and weak -SADEA- efficiency of this model are developed. Secondly, some properties about SADEA-efficiency are discussed. Finally, the overall efficiency of the commercial banks is studied by using this method and the ways how to improve an inefficient bank into efficient one are given.