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Financial Fragility and the Exchange Rate Regime

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  • Roberto Chang
  • Andres Velasco

Abstract

We study financial fragility, exchange rate crises and monetary policy in an open economy model in which banks are maturity transformers as in Diamond-Dybvig. 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 rate and flexible rates, with and without a lender of last resort. A currency board cannot implement a socially optimal allocation; in addition, under a currency board bank runs are possible. 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. Larger capital inflows enhance welfare if the no-run equilibrium occurs, but may also render the economy more vulnerable to self-fulfilling runs. A flexible exchange rate system implements the social optimum and eliminates runs, provided the exchange rate and central bank lending policies of the central bank are appropriately designed.

Suggested Citation

  • Roberto Chang & Andres Velasco, 1998. "Financial Fragility and the Exchange Rate Regime," NBER Working Papers 6469, National Bureau of Economic Research, Inc.
  • Handle: RePEc:nbr:nberwo:6469
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    JEL classification:

    • F3 - International Economics - - International Finance
    • E5 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit

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