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arXiv 2602.02541physics.soc-phmath.RA
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全球失衡的谱拓扑:一个用于国际收支系统性风险的图论框架

The Spectral Topology of Global Imbalances:A Graph-Theoretic Framework for Systemic Risk in the Balance of Payments

Department of Mathematics, Government College (Autonomous), Rajahmundry(拉贾蒙德里政府学院(自治)数学系);Department of Economics, Government College (Autonomous), Rajahmundry(拉贾蒙德里政府学院(自治)经济学系);Government Degree College, Seethanagaram(塞塔纳加兰政府学位学院)

Chandrasekhar Gokavarapu, Sanjeev Kumar Chejarla, Balayya Rajana, V. N. S. R. Murthy Duggirala, Srinivasulu Chittaru

AI总结:

本文提出一个基于图论的框架,通过分析国际收支的谱拓扑来评估系统性风险,定义了谱稳定性准则和稳定性边际,并利用非回溯算子确定主权债务传染的拓扑阈值。

摘要:

传统国际收支(BoP)分析将国家外部地位视为主要的时序数据。这忽略了全球失衡的一个本质结构性事实:全球失衡是在一个有向、加权的跨境经常账户和金融债权网络中共同实现的。我们提出一个网络理论范式,在这个范式中,世界经济是一个有向图,其边权重编码净双边暴露。在此设定中,系统性脆弱性是全球暴露矩阵的谱拓扑的涌现属性。我们开发了(i)一个数学上明确的国际收支邻接算子构造,(ii)一个证明系统在全球渐近稳定当且仅当谱半径ρ(A) < 1的谱稳定性准则,以及(iii)一个量化全球经济接近“临界减缓”相变的谱稳定性边际(δ=1 - ρ(B))。此外,我们定义了一个系统性风险指数,利用特征向量中心性来识别那些失败在数学上与全球崩溃无法区分的节点。最后,我们运用非回溯(Hashimoto)算子推导出一个精确的拓扑阈值,用于主权债务传染,过滤双边“噪声”以隔离深层网络循环。我们的结果表明,系统性风险是全球谱拓扑的潜在属性,需要宏观审慎干预,针对网络的谱间隙而非个人债务与GDP比率。

英文摘要:

We model global balance-of-payments linkages as a directed weighted exposure network and study systemic fragility through the spectrum of the associated operators. From a signed bilateral-flow matrix, we construct a nonnegative exposure lift, derive a spectral stability criterion for linear propagation, and define node- and edge-level risk measures using Perron-Frobenius geometry, PageRank, and marginal spectral impact. We further give two complementary extensions: a directed Laplacian formulation for shock diffusion and a non-backtracking threshold for cascade formation on sparse exposure networks. The framework identifies systemic risk as a topological property of the global network rather than a collection of isolated country indicators, and it yields mathematically explicit diagnostics for resilience, concentration of stress, and targeted stabilization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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