考虑非期望产出的我国商业银行效率研究

When estimating the efficiency of commercial banks, it will make the efficiency estimated inaccurate if ignore undesirable outputs such as non-performing loans. Using Direction Distance Functions and Malmquist-Luenberger Index and considering the non-performing loans as the undesirable output, the article evaluate the efficiency of 16 major commercial Banks and productivity index of bank industry in China over the period from 2006 to 2010. The results show that: during the sample period, the efficiency and productivity index of commercial banks in our country is improving; The efficiency of large state-owned commercial banks is lower than joint-stock commercial banks, but the gap is more and more small; In addition, it will overestimate the efficiency and productivity growth of commercial banks if ignore undesirable output.