中国商业银行成本效率实证研究

基于随机前沿法原理,利用超越对数成本函数模型,本文评估了中国14家主要商业银行在1998—2003年间的成本效率情况,并按考虑贷款产出质量的2003年成本效率情况对各银行排序。实证研究结论为(1)中国商业银行总体的成本效率并不很差;(2)国有商业银行成本效率处于上升趋势,股份制商业银行则保持波动攀升趋势;(3)贷款产出质量对中国商业银行的成本效率有明显的负面影响,在考虑产出质量时,国有商业银行成本效率明显落后于股份制商业银行。

The Empirical Analysis on the Cost Efficiencies of Chinese Commercial Banks

This paper uses Stochastic Frontier Approach in the framework of a translog cost function with an index system of inputs and outputs. In the paper we estimate the cost efficiencies of 14 Chinese commercial banks from 1998 to 2003 and arrange them in their cost efficiencies with real loan production in 2003. There are four characteristics and contributions in this paper. The first one is that we research the cost efficiencies of Chinese commercial banks with stochastic frontier approach and translog cost function in China. The second one is that we set up a index system composed of loan, securities and invests and non-interest incomes that can consider the characteristic of productions and incomes and provide a new point of view for estimating the cost efficiency. The third one is we construct improved samples with real loans which don't have non-performing loans and solve the problem in samples and testified the bad influence of loans quality to cost efficiency and improve the veracity of banks cost efficiencies estimating instead of appeared finance data. The fourth one is that we change the sample data of state commercial banks and the bank of communications in fixed scales that can solve the distortion of cost efficiency estimation brought by big disperse degree of banks cost data.