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Financial instability contagion: a dynamical systems approach

机译:金融不稳定蔓延:一种动态系统方法

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We build a multi-agent dynamical system for the global economy to investigate and analyse financial crises. The agents are large aggregates of a subeconomy, and the global economy is a collection of subeconomies. We use well-known theories of dynamical systems to represent a financial crisis as propagation of a negative shock on wealth due the breakage of a financial equilibrium. We first extend the framework of the market instability indicator, an early warning signal defined for a single economy as the spectral radius of the Jacobian matrix of the wealth dynamical system. Then, we formulate a quantitative definition of instability contagion in terms thereof. Finally, we analyse the mechanism of instability contagion for both single and multiple economies. Our contribution is to provide a methodology to quantify and monitor the level of instability in sectors and stages of a structured global economic model and how it may propagate through its components.
机译:我们为全球经济建立了多主体动态系统,以调查和分析金融危机。主体是子经济的大集合,全球经济是子经济的集合。我们使用众所周知的动力系统理论将金融危机描述为由于金融平衡破裂而对财富造成的负面冲击的传播。我们首先扩展市场不稳定指标的框架,该指标是为单个经济体定义的预警信号,它是财富动态系统雅可比矩阵的频谱半径。然后,我们据此制定了不稳定性传染的定量定义。最后,我们分析了单一经济体和多重经济体的不稳定性传染机制。我们的贡献是提供一种方法来量化和监视结构化的全球经济模型的各个部门和阶段的不稳定程度,以及不稳定因素如何通过其组成部分传播。

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