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供应链担保圈风险传染机制研究

2017-06-30崔蓓王玉霞

软科学 2017年6期

崔蓓++王玉霞

摘要:通过建立有向加权网络模型,分析供应链担保圈的网络结构对风险传染的作用机理,并以调和距离衡量企业间担保关系,解释担保圈的两面性——风险分担和风险连坐。研究结果表明担保圈网络结构和风险传染关系具有相变的特征。当风险低于一定阈值,高度连通的网络中担保关系的多样化能够有效保持网络的稳定性。当风险高于一定阈值,高度连通的网络反而构成风险传染的路径,其稳定性和弹性大大降低。企业间担保关系具有非线性的特征,担保圈网络结构对风险传染的作用机制取决于企业间调和距离。

关键词:供应链;担保圈;风险传染

DOI:10.13956/j.ss.1001-8409.2017.06.29

中图分类号:F275 文献标识码:A 文章编号:1001-8409(2017)06-0134-05

Study on Guarantee Circle Risk Contagion Mechanism in Supply Chain

CUI Bei,WANG Yuxia

(School of Economics, Dongbei University of Finance and Economics,Dalian 116000)

Abstract: Based on directed and weighted network, this paper investigates how risk contagion is affected by the configuration of guarantee circle in supply chain, focuses on the influence of network configuration on the stability and resilience of guarantee circle. By model analysis, this article shows that as long as the magnitude of risk is sufficiently small, a more densely connected network contributes to improve system stability; beyond a certain point, network interconnection serves as a mechanism for risk contagion. Because of the nonlinear of interfirm interaction, the effect of network configuration on risk contagion relies on interfirm harmonic distance.

Key words:supply chain;guarantee circle;risk contagion

引言

2014年以来,我国经济下行压力逐渐增强,担保圈引发的信贷风险和区域风险在一些行业和地区凸显出来。与传统的信用风险相比,互保圈、联保圈关系错综复杂,随着断点的出现,风险在担保圈的第二层次、第三层次不断积累放大,呈现出非线性膨胀的特征。同时,担保关系通常在分属供应链上下游不同行业的企业间形成,一旦风险爆发,担保关系作为一种典型的强关系,导致风险沿着供应链进一步传染[1,2]。这样,不同维度的风险相互影响,极易引发区域和行业的系统性风险。曾经在推动民营经济崛起中扮演重要角色的互保、联保模式,当经济下行时,却导致一系列企业发生“风险连坐”,使局部风险综合起来形成系统性风险。……

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