境内银行网络结构的特征分析
Analysis of the Characteristics of the Network Structure of Domestic Banks in China

本文基于12家我国境内银行2013年至2017年资产负债表中的同业拆借数据，采用复杂网络理论、阈值法对其构成的银行同业拆借网络的节点度、平均路径长度以及聚集系数等拓扑特征进行研究分析，并通过其分析结果进而推断出我国境内银行网络的特性。实证结果发现，我国境内银行的同业拆借网络有着节点度大、平均路径长度小且聚集系数高的特点，呈现小世界特征，一方面表明我国境内银行网络的同业拆借市场效率高、分布广，网络中的银行可以较快较便捷地获得融资，市场也有着高度合理的资源配置；另一方面表明我国境内银行网络有着较高的风险传染性，容易牵一发而动全身，轻则导致整个银行网络的瘫痪，重则引发全国性的金融危机。
Based on the inter-bank lending data of 12 domestic banks from 2013 to 2017, this paper uses the complex network theory and threshold method to analyze the topological characteristics of the inter-bank lending network, such as node degree, average path length and aggregation coefficient, and then infers the characteristics of the domestic bank network through its analysis results. The empirical results show that the inter-bank lending network of domestic banks in China has the characteristics of large node degree, small average path length and high aggregation coefficient, showing the characteristics of a small world. On the one hand, it shows that the inter-bank lending market of domestic banks in China has high efficiency and wide distribution, the banks in the network can obtain financing quickly and conveniently, and the market also has a highly reasonable resource allocation. On the one hand, it shows that the banking network in China has a high risk contagion, which is easy to lead to the whole body, light will lead to the paralysis of the whole banking network, and heavy will lead to the national financial crisis.