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Criticality in a model of banking crises

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  • Giulia Iori
  • Saqib Jafarey

Abstract

An interbank market lets participants pool the risk arising from the combination of illiquid investments and random withdrawals by depositors. But it also creates the potential for one bank's failure to trigger off avalanches of further failures. We simulate a model of interbank lending to study the interplay of these two effects. We show that when banks are similar in size and exposure to risk, avalanche effects are small so that widening the interbank market leads to more stability. But as heterogeneity increases, avalanche effects become more important. By varying the heterogeneity and connectivity across banks, the system enters a critical regime with a power law distribution of avalanche sizes.

Suggested Citation

  • Giulia Iori & Saqib Jafarey, 2001. "Criticality in a model of banking crises," Papers cond-mat/0104080, arXiv.org.
    • Handle: RePEc:arx:papers:cond-mat/0104080
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    1. repec:cty:dpaper:1440 is not listed on IDEAS
    2. Cohen-Cole, Ethan & Patacchini, Eleonora & Zenou, Yves, 2015. "Static and dynamic networks in interbank markets," Network Science, Cambridge University Press, vol. 3(1), pages 98-123, March.
    3. Ruggero Grilli & Gabriele Tedeschi & Mauro Gallegati, 2015. "Markets connectivity and financial contagion," Journal of Economic Interaction and Coordination, Springer;Society for Economic Science with Heterogeneous Interacting Agents, vol. 10(2), pages 287-304, October.
    4. Martínez-Jaramillo, Serafín & Pérez, Omar Pérez & Embriz, Fernando Avila & Dey, Fabrizio López Gallo, 2010. "Systemic risk, financial contagion and financial fragility," Journal of Economic Dynamics and Control, Elsevier, vol. 34(11), pages 2358-2374, November.
    5. repec:cty:dpaper:10.1016/j.jedc.2007.01.032 is not listed on IDEAS
    6. Vinko Zlatić & Giampaolo Gabbi & Hrvoje Abraham, 2015. "Reduction of Systemic Risk by Means of Pigouvian Taxation," PLOS ONE, Public Library of Science, vol. 10(7), pages 1-18, July.
    7. Guido Fioretti, 2005. "Credit Rationing in a Basic Agent-Based Model," Finance 0505002, University Library of Munich, Germany.
    8. Morteza Alaeddini & Philippe Madiès & Paul J. Reaidy & Julie Dugdale, 2023. "Interbank money market concerns and actors’ strategies—A systematic review of 21st century literature," Journal of Economic Surveys, Wiley Blackwell, vol. 37(2), pages 573-654, April.
    9. Grilli, Ruggero & Tedeschi, Gabriele & Gallegati, Mauro, 2014. "Bank interlinkages and macroeconomic stability," International Review of Economics & Finance, Elsevier, vol. 34(C), pages 72-88.
    10. Rendón de la Torre, Stephanie & Kalda, Jaan & Kitt, Robert & Engelbrecht, Jüri, 2016. "On the topologic structure of economic complex networks: Empirical evidence from large scale payment network of Estonia," Chaos, Solitons & Fractals, Elsevier, vol. 90(C), pages 18-27.
    11. Frank Schweitzer & Giorgio Fagiolo & Didier Sornette & Fernando Vega-Redondo & Douglas R. White, 2009. "Economic Networks: What Do We Know And What Do We Need To Know?," Advances in Complex Systems (ACS), World Scientific Publishing Co. Pte. Ltd., vol. 12(04n05), pages 407-422.
    12. Cohen-Cole, Ethan & Patacchini, Eleonora & Zenou, Yves, 2011. "Systemic Risk and Network Formation in the Interbank Market," Research Papers in Economics 2011:6, Stockholm University, Department of Economics.

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