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A Model to Analyse Financial Fragility

  • Charles A.E. Goodhart
  • Pojanart Sunirand
  • Dimitrios P. Tsomocos

This paper sets out a tractable model which illuminates problems relating to individual bank behaviour, to possible contagious inter-relationships between banks, and to the appropriate design of prudential requirements and incentives to limit `excessive' risk-taking. Our model is rich enough to include heterogeneous agents, endogenous default, and multiple commodity, and credit and deposit markets. Yet, it is simple enough to be effectively computable and can therefore be used as a practical framework to analyse financial fragility. Financial fragility in our model emerges naturally as an equilibrium phenomenon. Among other results, a non-trivial quantity theory of money is derived, liquidity and default premia co-determine interest rates, and both regulatory and monetary policies have non-neutral effects. The model also indicates how monetary policy may affect financial fragility, thus highlighting the trade-off between financial stability and economic efficiency.

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File URL: http://www.finance.ox.ac.uk/file_links/finecon_papers/2003fe13.pdf
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Paper provided by Oxford Financial Research Centre in its series OFRC Working Papers Series with number 2003fe13.

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Date of creation: 2003
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Handle: RePEc:sbs:wpsefe:2003fe13
Contact details of provider: Web page: http://www.finance.ox.ac.uk
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  1. Charles Goodhart, 1989. "Money, Information and Uncertainty: 2nd Edition," MIT Press Books, The MIT Press, edition 2, volume 1, number 0262071223.
  2. Tomoyuki Nakajima & Herakles Polemarchakis, 2005. "Money and Prices Under Uncertainty," Review of Economic Studies, Oxford University Press, vol. 72(1), pages 223-246.
  3. Hart, Oliver D., 1975. "On the optimality of equilibrium when the market structure is incomplete," Journal of Economic Theory, Elsevier, vol. 11(3), pages 418-443, December.
  4. Tobin, James, 1982. " The Commercial Banking Firm: A Simple Model," Scandinavian Journal of Economics, Wiley Blackwell, vol. 84(4), pages 495-530.
  5. Tsomocos, Dimitrios P., 2003. "Equilibrium analysis, banking and financial instability," Journal of Mathematical Economics, Elsevier, vol. 39(5-6), pages 619-655, July.
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