Abstract: Assnning extended responsibility is a key representation of undertaking social responsibilities. It's critical in solving regional credit insufficienly as well. This research analyzes the effect of undertaking or refusing the extended responsibility for both banks and non-bank financial institutions in credit cycle system. We establish six decision–making environment models for integrated and diversified decisions. The analysis gives an optimal decision and evaluates the social and economical effects of each model. Through introducing interest rate conduction, this paper discusses the function of interest rate in guiding participants to undertake their extended responsibility in both integrated decision and diversified decision. It analyzes the realization conditions of interest coordination in credit cycle system.The results indicocte that, compared with the behavior of refusing responsibility, both the social and economical return of the whole system will be greater when baks assum extended responsibility in six decision-making environments, and the return will greater when banks assum extended responsibility than commitment. This research comes to the conclusion that the system return is optimiged in assuming extended responsibility in integrated decision, and the Pareto improvement of participants' economical returns and the coordination of all game parties can be realized by interest rate mprovemedt.

Key words: game, extended bank responsibility, value added, conduction interest rates, coordination mechanism, game model

摘要： 履行延伸责任是银行承担社会责任的一个重要表现,是解决地区信贷资金支持不足的关键性问题。本文在信贷资金循环系统中分析了银行是否履行延伸责任对系统收益的影响。构建了集成化决策和分散化决策的六种不同的决策环境模型,给出了最优决策,评价了六种模型产生的社会效益和经济效益。引入了利率传导机制,讨论了信贷资金循环系统中集成化决策和分散化决策中利率在引导参与方履行延伸责任的作用,分析了信贷资金循环系统利益的协调实现条件。研究结果表明:在信贷资金循环系统六种决策环境下,履行延伸责任的社会效益和经济效益优于不履行延伸责任的;银行履行延伸责任的优于非银行贷款投放人履行延伸责任;集成化决策环境履行延伸责任的系统收益最好。同时,通过传导利率实现博弈各方利益协调和参与人经济效益的帕累托改进。

关键词: 博弈, 银行责任延伸, 价值增值, 传导利率, 协调机制, 决策模型