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Target zones for exchange rates and policy changes

  • Driffill, John
  • Sola, Martin

We extend a target zone model to allow for occasional changes in the policy regime which change the stochastic process driving fundamentals. A scenario we have in mind is that macroeconomic policy alternates between relatively tight and loose regimes. A key implication of our analysis is that occurrences which have the appearance of speculative attacks on a currency may be associated with market perceptions of a policy regime switch having taken place. This applies both to a sudden weakening and strengthening of a currency. Our model provides an explanation, based on fundamentals, why large changes in the exchange rate might be associated with no discernible contemporaneous change in the fundamental. Therefore the model provides an explanation for this phenomenon that is an alternative to explanations based on self-fulfilling expectations. Compared with most other models of target zones, other than those relying on intra-marginal intervention, this model is better able to reproduce key features of empirical distributions of exchange rates within the band. The distribution generated by our model has more mass at the centre and less at the edges of the band than is the case for most other models.

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Article provided by Elsevier in its journal Journal of International Money and Finance.

Volume (Year): 25 (2006)
Issue (Month): 6 (October)
Pages: 912-931

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Handle: RePEc:eee:jimfin:v:25:y:2006:i:6:p:912-931
Contact details of provider: Web page: http://www.elsevier.com/locate/inca/30443

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  1. Kenneth A. Froot & Maurice Obstfeld, 1989. "Exchange Rate Dynamics Under Stochastic Regime Shifts: A Unified Approach," NBER Working Papers 2835, National Bureau of Economic Research, Inc.
  2. Bertola, Giuseppe & Svensson, Lars E O, 1991. "Stochastic Devaluation Risk and the Empirical Fit of Target Zone Models," CEPR Discussion Papers 513, C.E.P.R. Discussion Papers.
  3. Campa, Jose M & Chang, P H Kevin, 1998. "ERM Realignment Risk and Its Economic Determinants as Reflected in Cross-Rate Options," Economic Journal, Royal Economic Society, vol. 108(449), pages 1046-66, July.
  4. Obstfeld, Maurice, 1996. "Models of currency crises with self-fulfilling features," European Economic Review, Elsevier, vol. 40(3-5), pages 1037-1047, April.
  5. Flood, Robert P. & Rose, Andrew K. & Mathieson, Donald J., 1991. "An empirical exploration of exchange-rate target-zones," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 35(1), pages 7-65, January.
  6. Sola, Martin & Driffill, John, 1994. "Testing the term structure of interest rates using a stationary vector autoregression with regime switching," Journal of Economic Dynamics and Control, Elsevier, vol. 18(3-4), pages 601-628.
  7. Andrew K. Rose & Lars E.O. Svensson, 1991. "Expected and Predicted Realignments: The FF/DM Exchange Rate During the EMS," NBER Working Papers 3685, National Bureau of Economic Research, Inc.
  8. Lars E. O. Svensson, 1992. "An Interpretation of Recent Research on Exchange Rate Target Zones," Journal of Economic Perspectives, American Economic Association, vol. 6(4), pages 119-144, Fall.
  9. Willman, Alpo, 1987. "Speculative attacks on the currency with uncertain monetary policy reactions," Economics Letters, Elsevier, vol. 25(1), pages 75-78.
  10. Robert P. Flood & Peter M. Garber, 1989. "The Linkage Between Speculative Attack and Target Zone Models of Exchange Rates," NBER Working Papers 2918, National Bureau of Economic Research, Inc.
  11. Paul Krugman & Marcus Miller, 1992. "Exchange Rate Targets and Currency Bands," NBER Books, National Bureau of Economic Research, Inc, number krug92-1, May.
  12. Blackburn, Keith & Sola, Martin, 1993. " Speculative Currency Attacks and Balance of Payments Crises," Journal of Economic Surveys, Wiley Blackwell, vol. 7(2), pages 119-44, June.
  13. Tristani, Oreste, 1994. " Variable Probability of Realignment in a Target Zone," Scandinavian Journal of Economics, Wiley Blackwell, vol. 96(1), pages 1-14.
  14. Maurice Obstfeld, 1984. "Rational and Self-Fulfilling Balance-of-Payments Crises," NBER Working Papers 1486, National Bureau of Economic Research, Inc.
  15. Driffill, John & Sola, Martin, 1998. "Intrinsic bubbles and regime-switching," Journal of Monetary Economics, Elsevier, vol. 42(2), pages 357-373, July.
  16. Miller, Marcus & Sutherland, Alan, 1990. "Britain's Return to Gold and Entry into the EMS: Expectations, Joining Conditions and Credibility," CEPR Discussion Papers 465, C.E.P.R. Discussion Papers.
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