Network models and financial stability
Systemic risk is a key concern for central banks charged with safeguarding overall financial stability. In this paper we investigate how systemic risk is affected by the structure of the financial system. We construct banking systems that are composed of a number of banks that are connected by interbank linkages. We then vary the key parameters that define the structure of the financial system - including its level of capitalisation, the degree to which banks are connected, the size of interbank exposures and the degree of concentration of the system - and analyse the influence of these parameters on the likelihood of contagious (knock-on) defaults. First, we find that the better capitalised banks are, the more resilient is the banking system against contagious defaults and this effect is non-linear. Second, the effect of the degree of connectivity is non-monotonic, that is, initially a small increase in connectivity increases the contagion effect; but after a certain threshold value, connectivity improves the ability of a banking system to absorb shocks. Third, the size of interbank liabilities tends to increase the risk of knock-on default, even if banks hold capital against such exposures. Fourth, more concentrated banking systems are shown to be prone to larger systemic risk, all else equal. In an extension to the main analysis we study how liquidity effects interact with banking structure to produce a greater chance of systemic breakdown. We finally consider how the risk of contagion might depend on the degree of asymmetry (tiering) inherent in the structure of the banking system. A number of our results have important implications for public policy, which this paper also draws out.
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- Diamond, Douglas W & Dybvig, Philip H, 1983.
"Bank Runs, Deposit Insurance, and Liquidity,"
Journal of Political Economy,
University of Chicago Press, vol. 91(3), pages 401-19, June.
- Mark J. Flannery, 1996.
"Financial crises, payment system problems, and discount window lending,"
Board of Governors of the Federal Reserve System (U.S.), pages 804-831.
- Flannery, Mark J, 1996. "Financial Crises, Payment System Problems, and Discount Window Lending," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 28(4), pages 804-24, November.
- Michael Boss & Helmut Elsinger & Martin Summer & Stefan Thurner, 2004. "An Empirical Analysis of the Network Structure of the Austrian Interbank Market," Financial Stability Report, Oesterreichische Nationalbank (Austrian Central Bank), issue 7, pages 77-87.
- Lelyveld, Iman van & Liedorp, Franka, 2006.
"Interbank Contagion in the Dutch Banking Sector: A Sensitivity Analysis,"
806, University Library of Munich, Germany.
- Iman van Lelyveld & Franka Liedorp, 2006. "Interbank Contagion in the Dutch Banking Sector: A Sensitivity Analysis," International Journal of Central Banking, International Journal of Central Banking, vol. 2(2), May.
- Helmut Elsinger & Alfred Lehar & Martin Summer, 2006.
"Risk Assessment for Banking Systems,"
INFORMS, vol. 52(9), pages 1301-1314, September.
- Upper, Christian & Worms, Andreas, 2004.
"Estimating bilateral exposures in the German interbank market: Is there a danger of contagion?,"
European Economic Review,
Elsevier, vol. 48(4), pages 827-849, August.
- Upper, Christian & Worms, Andreas, 2002. "Estimating Bilateral Exposures in the German Interbank Market: Is there a Danger of Contagion?," Discussion Paper Series 1: Economic Studies 2002,09, Deutsche Bundesbank, Research Centre.
- Demirguc-Kunt, Asli & Detragiache, Enrica, 1999.
"Does deposit insurance increase banking system stability ? An empirical investigation,"
Policy Research Working Paper Series
2247, The World Bank.
- Demirguc-Kunt, Asli & Detragiache, Enrica, 2002. "Does deposit insurance increase banking system stability? An empirical investigation," Journal of Monetary Economics, Elsevier, vol. 49(7), pages 1373-1406, October.
- Asli Demirguc-Kunt & Enrica Detragiache, 2000. "Does Deposit Insurance Increase Banking System Stability? An Empirical Investigation," Econometric Society World Congress 2000 Contributed Papers 1751, Econometric Society.
- C. H. Furfine, 1999. "Interbank exposures: quantifying the risk of contagion," BIS Working Papers 70, Bank for International Settlements.
- George Sheldon & Martin Maurer, 1998. "Interbank Lending and Systemic Risk: An Empirical Analysis for Switzerland," Swiss Journal of Economics and Statistics (SJES), Swiss Society of Economics and Statistics (SSES), vol. 134(IV), pages 685-704, December.
- Gale, D. & Allen, F., 1991.
"Limited Market Participation and Volatility of Asset Prices,"
Weiss Center Working Papers
14-91, Wharton School - Weiss Center for International Financial Research.
- Allen, Franklin & Gale, Douglas, 1994. "Limited Market Participation and Volatility of Asset Prices," American Economic Review, American Economic Association, vol. 84(4), pages 933-55, September.
- Allen, F. & Gale, D., 1991. "Limited Market Participation and Volatility of Asset Prices," Weiss Center Working Papers 2-92, Wharton School - Weiss Center for International Financial Research.
- Franklin Allen & Douglas Gale, 1976.
"Optimal Financial Crises,"
Center for Financial Institutions Working Papers
97-01, Wharton School Center for Financial Institutions, University of Pennsylvania.
- Rochet, Jean-Charles & Tirole, Jean, 1996.
"Interbank Lending and Systemic Risk,"
Journal of Money, Credit and Banking,
Blackwell Publishing, vol. 28(4), pages 733-62, November.
- De Bandt, Olivier & Hartmann, Philipp, 2000.
"Systemic risk: A survey,"
Working Paper Series
0035, European Central Bank.
- Larry Eisenberg & Thomas H. Noe, 2001. "Systemic Risk in Financial Systems," Management Science, INFORMS, vol. 47(2), pages 236-249, February.
- Hoggarth, Glenn & Reis, Ricardo & Saporta, Victoria, 2002.
"Costs of banking system instability: Some empirical evidence,"
Journal of Banking & Finance,
Elsevier, vol. 26(5), pages 825-855, May.
- Glenn Hoggarth & Ricardo Reis & Victoria Saporta, 2001. "Costs of banking system instability: some empirical evidence," Bank of England working papers 144, Bank of England.
- Rodrigo Cifuentes & Gianluigi Ferrucci & Hyun Song Shin, 2005.
"Liquidity risk and contagion,"
Bank of England working papers
264, Bank of England.
- Yehning Chen, 1999. "Banking Panics: The Role of the First-Come, First-Served Rule and Information Externalities," Journal of Political Economy, University of Chicago Press, vol. 107(5), pages 946-968, October.
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