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The Optimal Monetary Policy Response to Exchange Rate Misalignments


  • Cambell Leith


  • Simon Wren-Lewis



A common feature of exchange rate misalignments is that they produce a divergence between traded and non-traded goods sectors, which appears to pose a dilemma for policy makers. In this paper we develop a small open economy model which features traded and non-traded goods sectors with which to assess the extent to which monetary policy should respond to exchange rate misalignments. To do so we initially contrast the efficient outcome of the model with that under flexible prices and find that the flex price equilibrium exhibits an excessive exchange rate appreciation in the face of a positive UIP shock. By introducing sticky prices in both sectors we provide a role for policy in the face of UIP shocks. We then derive a quadratic approximation to welfare which comprises quadratic terms in the output gaps in both sectors as well as sectoral rates of inflation. These can be rewritten in terms of the usual aggregate variables, but only after including terms in relative sectoral prices and/or the terms of trade to capture the sectoral composition of aggregates. We derive optimal policy analytically before giving numerical examples of the optimal response to UIP shocks. Finally, we contrast the optimal policy with a number of alternative policy stances and assess the robustness of results to changes in model parameters.

Suggested Citation

  • Cambell Leith & Simon Wren-Lewis, 2006. " The Optimal Monetary Policy Response to Exchange Rate Misalignments," CDMA Conference Paper Series 0605, Centre for Dynamic Macroeconomic Analysis.
  • Handle: RePEc:san:cdmacp:0605

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    References listed on IDEAS

    1. McCallum, Bennett T & Nelson, Edward, 2000. "Monetary Policy for an Open Economy: An Alternative Framework with Optimizing Agents and Sticky Prices," Oxford Review of Economic Policy, Oxford University Press, vol. 16(4), pages 74-91, Winter.
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    5. Benigno, Gianluca & Thoenissen, Christoph, 2008. "Consumption and real exchange rates with incomplete markets and non-traded goods," Journal of International Money and Finance, Elsevier, vol. 27(6), pages 926-948, October.
    6. Ben S. Bernanke & Mark Gertler, 1999. "Monetary policy and asset price volatility," Proceedings - Economic Policy Symposium - Jackson Hole, Federal Reserve Bank of Kansas City, pages 77-128.
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    8. Kollmann, Robert, 2005. "Macroeconomic effects of nominal exchange rate regimes: new insights into the role of price dynamics," Journal of International Money and Finance, Elsevier, vol. 24(2), pages 275-292, March.
    9. Tatiana Kirsanova & Campbell Leith & Simon Wren-Lewis, 2006. "Should Central Banks Target Consumer Prices or the Exchange Rate?," Economic Journal, Royal Economic Society, vol. 116(512), pages 208-231, June.
    10. David Bowman & Brian M. Doyle, 2003. "New Keynesian, open-economy models and their implications for monetary policy," International Finance Discussion Papers 762, Board of Governors of the Federal Reserve System (U.S.).
    11. Bergin, Paul R., 2006. "How well can the New Open Economy Macroeconomics explain the exchange rate and current account?," Journal of International Money and Finance, Elsevier, vol. 25(5), pages 675-701, August.
    12. Jordi Gali & Tommaso Monacelli, 2005. "Optimal fiscal policy in a monetary union," Proceedings, Federal Reserve Bank of San Francisco.
    13. Wang, Jian, 2010. "Home bias, exchange rate disconnect, and optimal exchange rate policy," Journal of International Money and Finance, Elsevier, vol. 29(1), pages 55-78, February.
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    16. Kollmann, Robert, 2002. "Monetary policy rules in the open economy: effects on welfare and business cycles," Journal of Monetary Economics, Elsevier, vol. 49(5), pages 989-1015, July.
    17. Campbell Leith & Simon Wren-Lewis, 2006. "The Costs of Fiscal Inflexibility - Extended," Working Papers 2005_23, Business School - Economics, University of Glasgow.
    18. Nooman Rebei & Eva Ortega, 2005. "A Two Sector Small Open Economy Model. Which Inflation to Target?," Computing in Economics and Finance 2005 298, Society for Computational Economics.
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    Cited by:

    1. Chung-Fu Lai, 2016. "Tariff, Consumption Home Bias and Macroeconomic Dynamics," Asian Economic and Financial Review, Asian Economic and Social Society, vol. 6(8), pages 425-444, August.
    2. Povoledo, Laura, 2009. "The Volatility of the Tradeable and Nontradeable Sectors: Theory and Evidence," MPRA Paper 14852, University Library of Munich, Germany, revised Feb 2009.
    3. Charles Engel, 2011. "Currency Misalignments and Optimal Monetary Policy: A Reexamination," American Economic Review, American Economic Association, vol. 101(6), pages 2796-2822, October.
    4. Wang, Jian, 2010. "Home bias, exchange rate disconnect, and optimal exchange rate policy," Journal of International Money and Finance, Elsevier, vol. 29(1), pages 55-78, February.
    5. Fernando Alexandre & Pedro Bação & John Driffill, 2007. "Optimal monetary policy with a regime-switching exchange rate in a forward-looking model," GEMF Working Papers 2007-09, GEMF, Faculty of Economics, University of Coimbra.
    6. Leith, Campbell & Wren-Lewis, Simon, 2009. "Taylor rules in the open economy," European Economic Review, Elsevier, vol. 53(8), pages 971-995, November.
    7. Adriana Soares Sales & João Barata Ribeiro Blanco Barroso, 2012. "Coping with a Complex Global Environment: a Brazilian perspective on emerging market issues," Working Papers Series 292, Central Bank of Brazil, Research Department.

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    JEL classification:

    • F41 - International Economics - - Macroeconomic Aspects of International Trade and Finance - - - Open Economy Macroeconomics
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy

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