Risk-Sharing and Contagion in Networks
AbstractThe aim of this paper is to investigate how the capacity of an economic system to absorb shocks depends on the specific pattern of interconnections established among financial firms. The key trade-off at work is between the risk-sharing gains enjoyed by firms when they become more interconnected and the large-scale costs resulting from an increased risk exposure. We focus on two dimensions of the network structure: the size of the (disjoint) components into which the network is divided, and the "relative density" of connections within each component. We find that when the distribution of the shocks displays "fat" tails extreme segmentation is optimal, while minimal segmentation and high density are optimal when the distribution exhibits "thin" tails. For other, less regular distributions intermediate degrees of segmentation and sparser connections are also optimal. We also find that there is typically a conflict between efficiency and pairwise stability, due to a "size externality" that is not internalized by firms who belong to components that have reached an individually optimal size. Finally, optimality requires perfect assortativity for firms in a component.
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Bibliographic InfoPaper provided by European University Institute in its series Economics Working Papers with number ECO2013/01.
Date of creation: 2013
Date of revision:
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Firm networks; Contagion; Risk Sharing;
Other versions of this item:
- Antonio Cabrales & Piero Gottardi & Fernando Vega-Redondo, 2014. "Risk-Sharing and Contagion in Networks," CESifo Working Paper Series 4715, CESifo Group Munich.
- Antonio Cabrales & Piero Gottardi & Fernando Vega-Redondo, 2013. "Risk-sharing and contagion in networks," Economics Working Papers we1301, Universidad Carlos III, Departamento de Economía.
- D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
- C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
- G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
This paper has been announced in the following NEP Reports:
- NEP-ALL-2013-03-02 (All new papers)
- NEP-BAN-2013-03-02 (Banking)
- NEP-GTH-2013-03-02 (Game Theory)
- NEP-NET-2013-03-02 (Network Economics)
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Nier, Erlend & Yang, Jing & Yorulmazer, Tanju & Alentorn, Amadeo, 2008.
"Network models and financial stability,"
Bank of England working papers
346, Bank of England.
- X. Freixas & B. Parigi & J-C. Rochet, 2000.
"Systemic Risk, Interbank Relations and Liquidity Provision by theCentral Bank,"
DNB Staff Reports (discontinued)
47, Netherlands Central Bank.
- Freixas, Xavier & Parigi, Bruno M & Rochet, Jean-Charles, 2000. "Systemic Risk, Interbank Relations, and Liquidity Provision by the Central Bank," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 32(3), pages 611-38, August.
- Xavier Freixas & Bruno M. Parigi & Jean-Charles Rochet, 2000. "Systemic risk, interbank relations, and liquidity provision by the central bank," Proceedings, Federal Reserve Bank of Cleveland, pages 611-640.
- Xavier Freixas & Bruno Parigi & Jean Charles Rochet, 1998. "Systemic risk, interbank relations and liquidity provision by the Central Bank," Economics Working Papers 440, Department of Economics and Business, Universitat Pompeu Fabra, revised Sep 1999.
- Freixas, Xavier & Parigi, Bruno & Rochet, Jean Charles, 1999. "Systemic Risk, Interbank Relations and Liquidity Provision by the Central Bank," CEPR Discussion Papers 2325, C.E.P.R. Discussion Papers.
- Helmut Elsinger & Alfred Lehar & Martin Summer, 2002.
"Risk Assessment for Banking Systems,"
79, Oesterreichische Nationalbank (Austrian Central Bank).
- Allen, Franklin & Babus, Ana & Carletti, Elena, 2012.
"Asset commonality, debt maturity and systemic risk,"
Journal of Financial Economics,
Elsevier, vol. 104(3), pages 519-534.
- Allen, Franklin & Babus, Ana & Carletti, Elena, 2013. "Asset Commonality, Debt Maturity and Systemic Risk," Working Papers 10-30, University of Pennsylvania, Wharton School, Weiss Center.
- Allen, Franklin & Babus, Ana & Carletti, Elena, 2011. "Asset Commonality, Debt Maturity and Systemic Risk," CEPR Discussion Papers 8476, C.E.P.R. Discussion Papers.
- Paul Krugman, 1999. "Balance Sheets, the Transfer Problem, and Financial Crises," International Tax and Public Finance, Springer, vol. 6(4), pages 459-472, November.
- Ballester, Coralio & Calvó-Armengol, Antoni & Zenou, Yves, 2005.
"Who’s Who in Networks. Wanted: The Key Player,"
CEPR Discussion Papers
5329, C.E.P.R. Discussion Papers.
- Coralio Ballester & Antoni Calvó-Armengol & Yves Zenou, 2004. "Who's Who in Networks. Wanted: The Key Player," Working Papers 178, Barcelona Graduate School of Economics.
- Coralio Ballester & Antoni Calvo-Armengol & Yves Zenou, 2005. "Who's Who in Networks. Wanted: the Key Player," NajEcon Working Paper Reviews 666156000000000586, www.najecon.org.
- Antoni Calvó-Armengol & Rahmi İlkılıç, 2009.
"Pairwise-stability and Nash equilibria in network formation,"
International Journal of Game Theory,
Springer, vol. 38(1), pages 51-79, March.
- Antoni Calvó-Armengol & Rahmi Ilkiliç, 2004. "Pairwise-Stability and Nash Equilibria in Network Formation," Working Papers 182, Barcelona Graduate School of Economics.
- Antoni Calvó-Armengol & Rahmi Ilkiliç, 2005. "Pairwise-Stability and Nash Equilibria in Network Formation," Working Papers 2005.34, Fondazione Eni Enrico Mattei.
- Kroszner, Randall S & Rajan, Raghuram G, 1994. "Is the Glass-Steagall Act Justified? A Study of the U.S. Experience with Universal Banking before 1933," American Economic Review, American Economic Association, vol. 84(4), pages 810-32, September.
- Goyal, Sanjeev & Vega-Redondo, Fernando, 2007. "Structural holes in social networks," Journal of Economic Theory, Elsevier, vol. 137(1), pages 460-492, November.
- Daron Acemoglu & Asuman Ozdaglar & Alireza Tahbaz-Salehi, 2013. "Systemic Risk and Stability in Financial Networks," NBER Working Papers 18727, National Bureau of Economic Research, Inc.
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