不良贷款、城市商业银行全要素生产率及收敛性研究

City Commercial Bank of China and Its Dynamic Change of Total Factor Productivity Convergence Under Non-Performing Loans Constraints

本文以2007年至2015年我国61家城市商业银行为研究对象,采用SBM方向性距离函数和Malmquist生产率指数,实证测度了不良贷款约束下城市商业银行全要素生产率,并探讨了其收敛性。研究结果发现:城市商业银行全要素生产率整体呈现上升态势,年均增长率为0.1%,变化态势上呈现先上升后下降再上升的趋势,但各城市商业银行全要素生产率的年均增长率存在明显差异。进一步研究发现城市商业银行全要素生产率最终会收敛于自身稳定性水平。本文认为我国城市商业银行应加大技术创新投入,提高技术进步效率,同时应在保证规模效率的前提下实行规模扩张。

The paper takes the 61 city commercial banks in our country during the period spanning from 2007 to 2015 as the object of study,by adopting SBM directional distance function and Malmquist productivity index,it empirically measures their total factor productivity（TFP） and convergence under the constraint of non-performing loans.The empirical results indicate that the TFP of these city commercial banks on the whole is on the upward trend,with the average annual growth rate of 0.1%,which follows the rise-fall-rise pattern.But it needs to be noted that the average annual growth rate of the TFP of these city commercial banks is greatly different from one another.Further research reveals that the TFP above will eventually converge to their own stability level.This paper concludes that city commercial banks should increase investment in technological innovation,improve the efficiency of technological improvement,and conduct scale expansion under the prior condition that the scale efficiency is guaranteed.