中国商业银行市场势力对其效率和稳定性的影响

Chinese Commercial Bank's Market Power and Its Affects on the Efficiency and Stability

文章运用随机边界模型估算了中国商业银行近十年来的成本、利润效率,并分别以勒纳指数和Z指数代表市场势力和稳定性,考察了市场势力对银行经营效率和稳定性的影响。结果表明:内地商业银行整体的效率逐年上升,但仍落后于香港的银行;四大商业银行的效率低于中小银行。市场势力与效率呈反向关系,而与稳定性的关系要区别对待:市场势力一方面增加了中小银行和香港银行的稳定性,另一方面也增加了四大商业银行和交通银行的经营风险。因此,继续深入金融自由化和银行业改革,恰当地引入一些竞争,会对中国商业银行经营的效率和稳定性起到积极的作用。

With the stochastic frontier analysis（ SFA ）, this paper estimates the Chinese commercial banks＇ cost and profit efficiency over the past decade. Lerner index and Z-index, in the paper respectively represent market power and stability, are used to study the affects of the market power on operating efficiency and ＇the stability.The results show that the overall efficiency of commercial banks in the mainland increases year by year, but still lags behind that of the banks in Hong Kong. The four big commercial banks are less efficient than the small and medium banks. The market power has an inverse relationship with the efficiency, while its relationship with the stability should be treated differently. The market power, on the one hand, strengthens the stability of the small and medium banks and the banks in Hong Kong, on the other hand, increases the operational risks of the four big commercial banks and the Bank of Communications.Therefore, it will have a positive effect on the Chinese commercial bank＇s efficiency and stability to continue to deepen the financial liberalization and banking reforms and properly introduce the competition.