4Berger A N,Humphrey D B. Efficiency of financial insti- tutions. International survey and directions for future research [J].European journal of operational research, 1997,98(2).
5Banker R D,Chames A,Cooper W W. Some models for estimating technical and scale inefficiencies in data envelopment analysis[J].Management science, 1984,30 ( 9 ).
6Bonin J P,Hasan I,Wachtel P. Bank performance,efficien- cy and ownership in transition countries[J].Journal of Banking & Finance, 2005,29 ( 1 ).
7Chames A,Cooper W W,Khodes E. Measuring the effi- ciency of decision making units D].European journal of opera- tional research, 1978,2(6).
8Coelli T.A guide to DEAP version 2.1.a data envelopment analysis (computer)program [R].CEPA working paper, 1996.
9Fukuyama H,Matousek R. Efficiency of Turk- ish banking.Two-stage network system.Variable re- turns to scale model[J].Joumal of International Fi- nancial Markets, Institutions and Money, 2011, 21 (1).
10Sherman H D,Gold F. Bank branch operating efficiency.evaluation with data envelopment analysis [J].Joumal of Banking & Finance,1985,9(2).