The Multiplex Structure of Interbank Networks

Leonardo Bargigli (), Giovanni di Iasio (), Luigi Infante, Fabrizio Lillo and Federico Pierobon
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Federico Pierobon: Bank of Italy - Banking and Finance Supervision Department

Working Papers - Economics from Universita' degli Studi di Firenze, Dipartimento di Scienze per l'Economia e l'Impresa

Abstract: The interbank market has a natural multiplex network representation. We employ a unique database of supervisory reports of Italian banks to the Banca d'Italia that includes all bilateral exposures broken down by maturity and by the secured and unsecured nature of the contract. We find that layers have different topological properties and persistence over time. The presence of a link in a layer is not a good predictor of the presence of the same link in other layers. Maximum entropy models reveal different unexpected substructures, such as network motifs, in different layers. Using the total interbank network or focusing on a specific layer as representative of the other layers provides a poor representation of interlinkages in the interbank market and could lead to biased estimation of systemic risk.

Keywords: interbank market; network theory; systemic risk (search for similar items in EconPapers)
JEL-codes: C49 E51 G21 (search for similar items in EconPapers)
Pages: 42 pages
Date: 2013
New Economics Papers: this item is included in nep-ban, nep-mac and nep-net
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Citations: View citations in EconPapers (59)

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Related works:
Journal Article: The multiplex structure of interbank networks (2015)
Working Paper: The multiplex structure of interbank networks (2013)
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Persistent link: https://EconPapers.repec.org/RePEc:frz:wpaper:wp2013_26.rdf

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