范围经济效应与商业银行的风险防范  

Scope Economic Effect and Risk Prevention of Commercial Banks

作　　者：李军林[1,2] 朱沛华 Li Junlin;Zhu Peihua

机构地区：[1]中国人民大学经济学院 [2]中国人民大学中国特色社会主义经济建设协同创新中心

出　　处：《中州学刊》2018年第6期21-30,共10页Academic Journal of Zhongzhou

摘　　要：多元化的经营目标已经成为现代商业银行的重要特征,探索开拓业务范围的经济效益对研究银行业组织理论具有指导意义。基于多产出类型的超越对数成本函数模型并结合随机前沿方法,对中国商业银行2008—2015年的范围经济效应进行测算,并检验范围经济效应与银行资产报酬率和信用风险的相关关系,在控制了内生性问题后可以发现,尽管范围经济效应提高了银行的资产报酬率,但也会加剧银行的信用风险,且对信用风险的影响更强。这个结论得到了一系列稳健性检验结果的支撑。范围经济对风险的作用受到经营规模、流动性水平等因素的影响,小型银行追求范围经济效应会大幅提升自身的信用风险,而大型银行则能够小幅减缓风险水平;流动性水平越高,追求范围经济对风险的影响越低。The diversification of business objectives has become an important feature of modern commercial banks,thus exploring the economic benefits of the business scope is practical for the study of the banking organization theory. By way of estimating the trans-log cost function model of multi-output and being combined with the stochastic frontier approach,this article calculates the scope economies effect of Chinese commercial banks from 2008-2015 and tests the relationship of scope economies and bank performance（ ROA and credit risk）. Based on the instrumental variable method of panel data,this article finds that although the effect of scope economies improves the bank’s asset return,it also aggravates the credit risk of banks after controlling the endogenous problem. Moreover,the conclusion is supported by a series of robust test results. Furthermore,the effect of scope economies on risk is impacted by operational scale,liquidity level,etc. The pursuit of the scope economy effect by small banks will greatly enhance their own credit risk,while large banks can slightly slow down their risk level. The higher the liquidity level is,the lower the positive effect of economies of scope on bank risk is.

关 键 词：范围经济 内生性 经营绩效 超越对数成本函数 

分 类 号：F832[经济管理—金融学]