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我国商业银行效率的实证分析
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摘要
金融是现代经济的核心,银行业的发展关系到我国的金融的稳定与安全,银行业效率的高低也直接影响到我国社会资源的配置效果和金融资源的利用水平。我国按照WTO的承诺已逐步放开对我国金融市场的管制,越来越多的外资银行不断进入中国市场,竞争也将更加激烈,国内的银行机构普遍面临着严峻的挑战。因此我国商业银行必须要提高自身的竞争力,才能应对激烈的竞争。而竞争优势的本质就是效率优势,因此效率优势的比较、测度非常重要。对银行自身来讲,银行效率的测度有助于银行进行银行间效率比较,找出效率差距,为修正银行自身的管理策略提供参考;对中国银行监管当局来讲,有助于其判断各银行对金融资源有效利用的程度,从而制定更有效的监管政策。所以,研究我国商业银行的效率问题具有重要的理论意义和现实意义。
     本文首先进行了大量的文献检索与阅读,梳理目前商业银行效率方面的研究理论和实证方法,并对该项领域做较为深入评析。这也就是论文的第一至第三部分。本文的第四部分,是在国内外已有的研究基础上,结合中国银行业的实际情况和各项金融指标,测量我国商业银行的规模效率、技术效率以及成本效率,用以反映银行微观经营的有效程度。根据第四部分对银行效率的实证分析,本文在第五部分得出结论并给出相应的政策建议。
     作为衡量商业银行实现投入最小化或产出最大化的有效程度的技术效率,本文采用投入导向型的DEA方法,采用“超效率”模型来测量。研究发现四大国有商业银行的技术效率普遍偏低,与股份制银行相比有较大差距。这可能与国有商业银行高素质人才和金融创新的激励不足有关。工行、农行、建行处于最低效率之列,但其技术效率五年间有不同程度的提升。对于股份制银行而言,民生银行和兴业银行的技术效率最高,而华夏银行的效率偏低。
     作为反映商业银行规模变化对平均成本影响程度的规模效率,本文采用超越对数成本函数,通过多元线性回归进行测度。得出由于产权、竞争机制、经营管理技术以及金融创新水平等原因,我国银行业的规模经济并不明显,规模效率大致都在0.9-1.07范围内的结论。测得四大国有商业银行的规模经济值都大于1,而且四大国有商业银行的规模不经济的现象有递增的趋势,而交行、招行等股份制银行普遍存在着规模经济,但是规模经济的程度有所减弱。
     对反映银行投入成本控制有效性的成本效率的测量,本文运用参数方法中的DFA方法进行分析。最终得出兴业银行和招商银行的成本效率最高,而农行的成本效率最低,但国有商业银行与股份制商业银行的成本效率相差不大的结论。这与国家剥离国有银行不良债权等政策行为有关,还有一点不容忽视,就是在实证分析中与我国国有商业银行规模相近的银行样本不足,国有商业银行只能与规模较小的股份制银行和样本内的少数国有商业银行进行相对效率比较,从而出现国有商业银行成本效率评价偏高的情况。
     在实证分析的基础上,本文提出提高我国商业银行效率的政策建议。即:进一步完善竞争性的市场结构;改善商业银行的公司治理;优化人力资源配置以及积极推进银行的技术进步和金融创新。
Finance is the core of the modern economy. The development of bank industry is related directly to our country’s financial stability and safety. The banking efficiency is also related to the effect of social resources allocation and the utility level of financial resources.
     Since our country joined WTO, our country has cancelled limitation to the foreign banks. The foreign bank is now entering the Chinese market. Our commercial banks face the more fierce competition. Therefore, our commercial banks must improve their competitiveness to face the challenge. The core nature of competitiveness is banking efficiency. Thus it is very important to appraise and compare our country’s banking efficiency. The efficiency research is good for setting the financial regulation for the Chinese bank supervision authority and is good for Chinese commercial banks to judge the efficiency level distance from other banks so as to promote their own efficiency level. Consequently, it is very meaningful to do research on banking efficiency.
     It firstly interprets the basic meaning of the bank efficiency and the approaches applied in the banking efficiency research based on a full review of the related studies. Then, it uses the financial data of 12 native banks to measure the technical efficiency, scale efficiency and cost efficiency in order to reflect the micro-operational efficiency of native commercial banks. Finally, it gives an effective way to improve the Chinese commercial banks’efficiency.
     For the estimate of technical efficiency which reflects the capability of maximizing the output or minimizing the input, it adopts the input-oriented‘super-efficiency’DEA model in order to solve the problem of ranging the relatively effective DMUs more than one. The result indicates that the technical efficiency of the four state-owned banks is much lower than that of shareholding banks. It probably relates to the lack of high-quality talents and stimulant structure of financial innovation. The Industrial and Commercial Bank of China (icbc), the Agricultural Bank of China (abc) and the China Construction Bank (ccb) have the lowest technical efficiency but have improved more or less.
     For the estimate of the scale efficiency which reflects the variation of average cost due to scale change, it uses the multiple-liner regression model. The result indicates that the scale economy of native commercial banks is not clear. The scale efficiency is between 0.9 and 1.07. The scale efficiency value of four state-owned banks is all above 1, and the banks become more and more scale inefficient. Comparatively, the shareholding banks almost have the scale efficiency but the degree of the scale efficiency is decreasing.
     For the estimate of cost efficiency which measures the capability of cost control, it introduces the DFA (distribution free approach) to measure it. It finally indicates that the Industrial Bank and the China Merchant Bank have the best cost efficiency, while the Agricultural Bank of China has the lowest cost efficiency. But there isn’t much difference between the state-owned banks and shareholding banks. It is related to the action of stripping bad asset off by our government. And it is also related to insufficient samples.
     The empirical analysis finally gives some effective ways to improve the Chinese commercial banks’efficiency. Such as the optimization of property right structure of state-owned commercial banks, the optimization of asset disposition, accelerating the financial technical innovation, establishing the efficient incentive system and raising the quality of human resource, etc.
引文
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    【13】张建华,《我国商业银行效率的DEA方法及1997-2001年效率的实证分析》[J],《金融研究》,2003.3:11-25
    【14】李希义,任若恩,《国有商业银行与股份制商业银行生产效率的比较研究》[J],《生产力研究》,2005.1:51-54
    【15】朱南,卓贤,董屹,《关于我国国有商业银行效率的实证分析与改革策略》[J],《管理世界》, 2004.2:18-26
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    【17】常琨,贾守乔,《中国银行业X效率实证研究》[J],《南方经济》,2006.6:18-29
    【18】谢朝华,段军山,《基于DEA方法的我国商业银行X-效率研究》[J],《中国管理科学》,2005.4
    【19】钱蓁,《中国商业银行的效率研究-SFA方法分析》[J],《南京社会科学》,2003.1:42-46
    【20】张超,顾峰,邸强,《基于随机前沿方法的我国商业银行成本效率测度研究》[J],《经济问题探索》,2005.6:116-119
    【21】刘志新,刘琛,《基于DFA的中国商业银行效率研究》[J],《数量经济技术经济研究》,2004.4:42-45
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