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Robust monetary rules under unstructured model uncertainty

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  • Levine, Paul
  • Pearlman, Joseph

Abstract

This paper revisits a widely adopted approach to robust decision making developed by (Hansen and Sargent, 2003) and (Hansen and Sargent, 2008)--henceforth HS--and applies it to monetary policy design in the face of model uncertainty. We pay particular attention to two issues: first, we distinguish three possible forms of the implied game between malign nature and the policymaker in the HS procedure each leading to a different robust and approximating equilibria. Second, we impose the zero lower bound (ZLB) constraint on the nominal interest rate. We show that the ZLB constraint has serious consequences for a policymaker pursuing HS-type robustness, especially when accompanied by an inability to commit.

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Bibliographic Info

Article provided by Elsevier in its journal Journal of Economic Dynamics and Control.

Volume (Year): 34 (2010)
Issue (Month): 3 (March)
Pages: 456-471

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Handle: RePEc:eee:dyncon:v:34:y:2010:i:3:p:456-471

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Web page: http://www.elsevier.com/locate/jedc

Related research

Keywords: Robustness Unstructured uncertainty Commitment Zero lower bound interest rate constraint;

References

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  1. Coenen, Gunter & Wieland, Volker, 2003. "The zero-interest-rate bound and the role of the exchange rate for monetary policy in Japan," Journal of Monetary Economics, Elsevier, vol. 50(5), pages 1071-1101, July.
  2. J. Tetlow, Robert & von zur Muehlen, Peter, 2001. "Robust monetary policy with misspecified models: Does model uncertainty always call for attenuated policy?," Journal of Economic Dynamics and Control, Elsevier, vol. 25(6-7), pages 911-949, June.
  3. Leitemo, Kai & Söderström, Ulf, 2005. "Robust Monetary Policy in a Small Open Economy," CEPR Discussion Papers 5071, C.E.P.R. Discussion Papers.
  4. Levine, Paul L, 1991. "Should Rules be Simple?," CEPR Discussion Papers 515, C.E.P.R. Discussion Papers.
  5. Carl E. Walsh, 2003. "Implications of a changing economic structure for the strategy of monetary policy," Proceedings - Economic Policy Symposium - Jackson Hole, Federal Reserve Bank of Kansas City, pages 297-348.
  6. Adam, Klaus & Billi, Roberto M., 2005. "Discretionary monetary policy and the zero lower bound on nominal interest rates," CFS Working Paper Series 2005/16, Center for Financial Studies (CFS).
  7. Olivier Blanchard & Jordi Galí, 2010. "Labor Markets and Monetary Policy: A New Keynesian Model with Unemployment," American Economic Journal: Macroeconomics, American Economic Association, vol. 2(2), pages 1-30, April.
  8. Currie,David & Levine,Paul, 1993. "Rules, Reputation and Macroeconomic Policy Coordination," Cambridge Books, Cambridge University Press, number 9780521441964.
  9. Giordani, Paolo & Söderlind, Paul, 2002. "Solution of Macromodels with Hansen-Sargent Robust Policies: Some Extensions," Working Paper Series in Economics and Finance 499, Stockholm School of Economics, revised 15 May 2003.
  10. Dennis, Richard & Leitemo, Kai & Söderström, Ulf, 2006. "Methods for Robust Control," CEPR Discussion Papers 5638, C.E.P.R. Discussion Papers.
  11. Batini, Nicoletta & Justiniano, Alejandro & Levine, Paul & Pearlman, Joseph, 2006. "Robust inflation-forecast-based rules to shield against indeterminacy," Journal of Economic Dynamics and Control, Elsevier, vol. 30(9-10), pages 1491-1526.
  12. Giannoni, Marc P., 2002. "Does Model Uncertainty Justify Caution? Robust Optimal Monetary Policy In A Forward-Looking Model," Macroeconomic Dynamics, Cambridge University Press, vol. 6(01), pages 111-144, February.
  13. Hansen, Lars Peter & Sargent, Thomas J., 2003. "Robust control of forward-looking models," Journal of Monetary Economics, Elsevier, vol. 50(3), pages 581-604, April.
  14. Söderlind, Paul, 1998. "Solution and Estimation of RE Macromodels with Optimal Policy," Working Paper Series in Economics and Finance 256, Stockholm School of Economics.
  15. Paul Levine & Joseph Pearlman & George Perendia, 2007. "Estimating DSGE Models under Partial Information," School of Economics Discussion Papers 1607, School of Economics, University of Surrey.
  16. Levine, Paul, 2008. "Robust monetary rules under unstructured and structured model uncertainty," Working Paper Series 0899, European Central Bank.
  17. Leitemo, Kai & Söderström, Ulf, 2008. "Robust Monetary Policy In The New Keynesian Framework," Macroeconomic Dynamics, Cambridge University Press, vol. 12(S1), pages 126-135, April.
  18. Gino Cateau, 2006. "Guarding Against Large Policy Errors under Model Uncertainty," Working Papers 06-13, Bank of Canada.
  19. Levine, Paul & McAdam, Peter & Pearlman, Joseph, 2008. "Quantifying and sustaining welfare gains from monetary commitment," Journal of Monetary Economics, Elsevier, vol. 55(7), pages 1253-1276, October.
  20. Levine, Paul & McAdam, Peter & Pearlman, Joseph G. & Pierse, Richard, 2008. "Risk Management in Action. Robust monetary policy rules under structured uncertainty," Working Paper Series 0870, European Central Bank.
  21. Eggertsson, Gauti B., 2006. "The Deflation Bias and Committing to Being Irresponsible," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 38(2), pages 283-321, March.
  22. Coenen, Günter, 2003. "Inflation persistence and robust monetary policy design," Working Paper Series 0290, European Central Bank.
  23. Dennis, Richard & Soderstrom, Ulf, 2006. "How Important Is Precommitment for Monetary Policy?," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 38(4), pages 847-872, June.
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