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Contagion in financial systems: A Bayesian network approach

Carsten Chong and Claudia Kl\"uppelberg

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Abstract: We develop a structural default model for interconnected financial institutions in a probabilistic framework. For all possible network structures we characterize the joint default distribution of the system using Bayesian network methodologies. Particular emphasis is given to the treatment and consequences of cyclic financial linkages. We further demonstrate how Bayesian network theory can be applied to detect contagion channels within the financial network, to measure the systemic importance of selected entities on others, and to compute conditional or unconditional probabilities of default for single or multiple institutions.

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Date: 2017-02, Revised 2017-07
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Published in SIAM J. Financial Math., 9(1):28-53, 2018

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