【摘要】 党的十九大报告聚焦生态文明体制改革,明确提出了发展绿色金融的战略要求。商业银行作为实施绿色信贷政策的主体,更加关注因此而产生的成本效率问题,即考量银行自身是得不偿失抑或得偿所愿?本文基于2005—2017年间73家中国商业银行的数据,首先,运用SFA模型测算商业银行的成本效率;其次,运用倾向得分匹配—双重差分法(PSM-DID)实证分析绿色信贷政策对银行成本效率影响的净效应;最后,采用边际动态检验方法考察绿色信贷政策净效应的影响趋势。文章发现绿色信贷政策的实施会通过成本效应机制降低银行成本效率,但同时因其改善了银行的信贷风险管理、提升了银行的声誉,从而对银行成本效率施加正向影响。此外,文章还发现绿色信贷政策的净效应呈现U型趋势,表现为2007—2013年绿色信贷政策净效应负向影响加深,2014年后出现转好信号,现已越过U型谷底。因此,从长期看,绿色信贷政策将有利于银行成本效率提升。更多还原

【Abstract】 Green finance is an important strategy for establishing a more ecologically sustainable civilization, according to the 19 th CPC National Congress. As active participants in green credit policy, Chinese commercial banks play a crucial role in the relationship between economic growth and the environment. For commercial banks, cost efficiency, resource allocation, and risk control have a key impact on the national economy and social stability as a whole. Although green finance has attracted increasing public attention in recent years, the cost efficiency of the green credit policy remains under-studied. Therefore, this paper focuses on whether commercial banks sacrifice their original cost-efficiency targets in implementing the green credit policy, and whether this policy can result in a win-win situation.We discuss the cost efficiency of the green credit policy from the perspective of resource allocation. The paper analyzes the mechanism of cost effects, credit risk management and reputation, respectively, based on relevant economic theories and academic references, and it offers three hypotheses, as follows:H1: Green credit policy can lower banks’ cost efficiency by way of the cost effects mechanism. Compared with normal loans, green credit increases environmental audit costs, incurs the cost of training personnel in both ecology and finance, and leads to opportunity costs from transferring loans to green industries(Hu and Zhang, 2016; Ma and Jiang, 2009). Therefore, even if the balance for green credit increases, the profits will be eaten up due to increasing costs. H2: Green credit policy has a positive impact on bank cost efficiency through the credit risk management mechanism. Commercial banks continuously optimize their risk management tools and adjust credit structures when they implement green credit policy to boost green industries and industrial structures and guide reasonable resource allocation. They can also include environmental risk factors in credit rating systems to avoid bank losses. H3: Green credit policy has a positive impact on bank cost efficiency through the reputation mechanism. Previous research finds that having a reputation for environmentally responsible behavior makes companies more competitive(Ma and Jiang, 2009). Bank competitiveness is strengthened by the brand effect and product differentiation of the green credit policy, and, at the same time, the social contribution ratio can be elevated by increasing the credit inputs of green industries for the fullest positive effect of the reputation mechanism(Liu et al., 2017). The paper samples data from 73 Chinese commercial banks during the period 2005-2017. First, it uses the stochastic frontier approach to measure bank cost efficiency. Second, it uses the propensity score matching difference-in-differences method to empirically analyze the net effects of green credit policy on bank cost efficiency. Third, it examines trends in the net effects of green credit policy by applying the marginal dynamic test method. Lastly, it confirms the hypothesis that the green credit policy will lower cost efficiency due to cost effects while also having positive effects that result from credit risk management and the reputation mechanism. Furthermore, we find that the net effects of the green credit policy have a U shape: the negative net effects of the policy worsened from 2007 to 2013 but have flattened out since 2014. Therefore, the gains will overcome the losses by implementing the policy with positive credit risk management and the reputation mechanism in the long run.Several major suggestions are made based on these empirical results. First, commercial banks should develop their information disclosure system for green credit to reduce the relevant costs, such as setting up a unified information management platform linking the central bank, the China Banking and Insurance Regulatory Commission, the environmental sector and commercial banks. Second, commercial banks should enhance credit risk management by improving the legal system of green finance and establishing collateral agencies. Lastly, commercial banks should engage in green finance to improve their reputation, such as by establishing internal green credit systems according to the Equator Principles and taking environmental risk into consideration when pricing loans.更多还原