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Financial fragility and the exchange rate regime

  • Roberto Chang
  • Andres Velasco

We study financial fragility, exchange rate crises, and monetary policy in an open economy version of a Diamond-Dybvig model. The banking system, the exchange rate regime, and central bank credit policy are seen as parts of a mechanism intended to maximize social welfare; if the mechanism fails, banking crises and speculative attacks become possible. We compare currency boards, fixed rates, and flexible rates with and without a lender of last resort. A currency board cannot implement a socially optimal allocation; in addition, bank runs are possible under a currency board. A fixed exchange rate system may implement the social optimum but is more prone to bank runs and exchange rate crises than a currency board. A flexible rate system implements the social optimum and eliminates runs, provided the exchange rate and central bank lending policies are appropriately designed.

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Paper provided by Federal Reserve Bank of Atlanta in its series Working Paper with number 97-16.

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Date of creation: 1997
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Publication status: Published in Journal of Economic Theory, May 2000
Handle: RePEc:fip:fedawp:97-16
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  1. Stephen D. Williamson, 1995. "Discount Window Lending and Deposit Insurance," Macroeconomics 9504001, EconWPA, revised 18 Apr 1995.
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  8. Xavier Freixas & Jean-Charles Rochet, 1997. "Microeconomics of Banking," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262061937, June.
  9. Ronald I. McKinnon & Huw Pill, 1996. "Credible Liberalizations and International Capital Flows: The "Overborrowing Syndrome"," NBER Chapters, in: Financial Deregulation and Integration in East Asia, NBER-EASE Volume 5, pages 7-50 National Bureau of Economic Research, Inc.
  10. Jeffrey D. Sachs & Aaron Tornell & Andrés Velasco, 1996. "Financial Crises in Emerging Markets: The Lessons from 1995," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 27(1), pages 147-216.
  11. 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.
  12. Krugman, Paul, 1979. "A Model of Balance-of-Payments Crises," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 11(3), pages 311-25, August.
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  14. Neil Wallace, 1996. "Narrow banking meets the Diamond-Dybvig model," Quarterly Review, Federal Reserve Bank of Minneapolis, issue Win, pages 3-13.
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