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借鉴Lucchetta提出的银行市场结构表示方法和研究思路,在假设信用风险和流动性风险都是不由银行自身决定的外生变量的条件下,以信用风险和流动性风险的不同组合表征银行市场结构,以自身收益最大化为银行决策目标,建立恰当的数学模型从理论上研究银行市场结构对银行市场均衡的影响。研究结果表明,在以信用风险和流动性风险度量的任何集中度的银行市场中,都既存在使银行市场运行良好的市场结构,也存在使银行市场体系崩溃的市场结构;当银行市场结构变量位于某个区间时,不同的流动性风险分布和不同的银行集中度将对银行市场均衡产生显著不同的影响。要使银行市场体系持续健康运行,就必须保持合理的银行市场结构。
Draws lessons from Lucchetta’s representation of bank market structure and research ideas, assumes that credit risk and liquidity risk are both exogenous variables not determined by the bank itself, and uses different combinations of credit risk and liquidity risk to represent the market structure of the bank, To maximize their own earnings as the bank’s decision-making goals, the establishment of an appropriate mathematical model to study the theoretical study of the bank market structure of the bank market equilibrium. The results show that there is not only a market structure that makes the banking market well run but also a market structure that makes the banking market system collapse at any concentration in the banking market measured by credit risk and liquidity risk. When the bank market structure variables When located in a certain interval, different liquidity risk distributions and different bank concentrations will have significantly different effects on the bank market equilibrium. For the banking market system to be sustained and healthy, we must maintain a reasonable banking market structure.