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Robustifying learnability

Listed author(s):
  • Tetlow, Robert J.
  • von zur Muehlen, Peter

In recent years, the learnability of rational expectations equilibria (REE) and determinacy of economic structures have rightfully joined the usual performance criteria among the sought-after goals of policy design. Some contributions to the literature, including Bullard and Mitra (2001) and Evans and Honkapohja (2002), have made significant headway in establishing certain features of monetary policy rules that facilitate learning. However a treatment of policy design for learnability in worlds where agents have potentially misspecified their learning models has yet to surface. This paper provides such a treatment. We begin with the notion that because the profession has yet to settle on a consensus model of the economy, it is unreasonable to expect private agents to have collective rational expectations. We assume that agents have only an approximate understanding of the workings of the economy and that their learning the reduced forms of the economy is subject to potentially destabilizing perturbations. The issue is then whether a central bank can design policy to account for perturbations and still assure the learnability of the model. Our test case is the standard New Keynesian business cycle model. For different parameterizations of a given policy rule, we use structured singular value analysis (from robust control theory) to find the largest ranges of misspecifications that can be tolerated in a learning model without compromising convergence to an REE. In addition, we study the cost, in terms of performance in the steady state of a central bank that acts to robustify learnability on the transition path to REE. (Note: This paper contains full-color graphics) JEL Classification: C6, E5

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Paper provided by European Central Bank in its series Working Paper Series with number 0593.

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Date of creation: Feb 2006
Handle: RePEc:ecb:ecbwps:20060593
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  1. Athanasios Orphanides & Richard D. Porter & David L. Reifschneider & Robert J. Tetlow & Frederico Finan, 1999. "Errors in the measurement of the output gap and the design of monetary policy," Finance and Economics Discussion Series 1999-45, Board of Governors of the Federal Reserve System (U.S.).
  2. Evans, George W. & Honkapohja, Seppo, 2002. "Monetary Policy, Expectations and Commitment," CEPR Discussion Papers 3434, C.E.P.R. Discussion Papers.
  3. Andrew Levin & Volker Wieland & John C. Williams, 1998. "Robustness of Simple Monetary Policy Rules under Model Uncertainty," NBER Working Papers 6570, National Bureau of Economic Research, Inc.
  4. Honkapohja, Seppo & Evans, George W., 2000. "Expectations and the stability problem for optimal monetary policies," Discussion Paper Series 1: Economic Studies 2000,10, Deutsche Bundesbank, Research Centre.
  5. Williams, John C. & Levin, Andrew T. & Wieland, Volker, 2001. "The performance of forecast-based monetary policy rules under model uncertainty," Working Paper Series 0068, European Central Bank.
  6. -, 1980. "Economic relations of Latin America with Europe," Cuadernos de la CEPAL, Naciones Unidas Comisión Económica para América Latina y el Caribe (CEPAL), number ns.n. edited by Cepal.
  7. Ben S. Bernanke & Julio J. Rotemberg, 1997. "Editorial in "NBER Macroeconomics Annual 1997, Volume 12"," NBER Chapters, in: NBER Macroeconomics Annual 1997, Volume 12, pages 1-6 National Bureau of Economic Research, Inc.
  8. Onatski, Alexei & Stock, James H., 2002. "Robust Monetary Policy Under Model Uncertainty In A Small Model Of The U.S. Economy," Macroeconomic Dynamics, Cambridge University Press, vol. 6(01), pages 85-110, February.
  9. Michael Ehrmann and Frank Smets, 2001. "Uncertain Potential Output: Implications for Monetary Policy," Computing in Economics and Finance 2001 8, Society for Computational Economics.
  10. -, 1986. "Escenarios de la economía mundial hasta 1990," Desarrollo Productivo 4557, Naciones Unidas Comisión Económica para América Latina y el Caribe (CEPAL).
  11. Ben S. Bernanke & Julio J. Rotemberg (ed.), 1997. "NBER Macroeconomics Annual 1997," MIT Press Books, The MIT Press, edition 1, volume 1, number 026252242x.
  12. Woodford, Michael, 2000. "Optimal Monetary Policy Inertia," Seminar Papers 666, Stockholm University, Institute for International Economic Studies.
  13. Ben S. Bernanke & Michael Woodford, 1997. "Inflation Forecasts and Monetary Policy," NBER Working Papers 6157, National Bureau of Economic Research, Inc.
  14. N/A, 1980. "Chapter II. The Home Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 91(1), pages 27-42, February.
  15. Coenen, Gunter, 2007. "Inflation persistence and robust monetary policy design," Journal of Economic Dynamics and Control, Elsevier, vol. 31(1), pages 111-140, January.
  16. Evans, George W. & McGough, Bruce, 2003. "Monetary policy, indeterminacy and learning," CFS Working Paper Series 2003/37, Center for Financial Studies (CFS).
  17. George W. Evans & Seppo Honkapohja, 2004. "Adaptive learning and monetary policy design," Macroeconomics 0405008, EconWPA.
  18. Clarida, Richard & Gali, Jordi & Gertler, Mark, 1997. "Monetary Policy Rules in Practice: Some International Evidence," Working Papers 97-32, C.V. Starr Center for Applied Economics, New York University.
  19. Albert Marcet & Juan P. Nicolini, 1995. "Recurrent hyperinflations and learning," Economics Working Papers 244, Department of Economics and Business, Universitat Pompeu Fabra, revised Nov 2001.
  20. Soderstrom, Ulf, 2002. " Monetary Policy with Uncertain Parameters," Scandinavian Journal of Economics, Wiley Blackwell, vol. 104(1), pages 125-145.
  21. Kaushik Mitra & Seppo Honkapohja, 2004. "Learning Stability in Economies with Heterogenous Agents," Royal Holloway, University of London: Discussion Papers in Economics 04/17, Department of Economics, Royal Holloway University of London, revised Jul 2004.
  22. Giannitsarou, Chryssi, 2005. "E-Stability Does Not Imply Learnability," Macroeconomic Dynamics, Cambridge University Press, vol. 9(02), pages 276-287, April.
  23. George W. Evans & Seppo Honkapohja & Noah Williams, 2010. "Generalized Stochastic Gradient Learning," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 51(1), pages 237-262, 02.
  24. 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.
  25. N/A, 1980. "Chapter I. The Economy in 1979," National Institute Economic Review, National Institute of Economic and Social Research, vol. 91(1), pages 8-26, February.
  26. N/A, 1980. "Chapter II. The Home Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 92(1), pages 18-32, May.
  27. Richard Clarida & Jordi Gali & Mark Gertler, 1999. "The Science of Monetary Policy: A New Keynesian Perspective," NBER Working Papers 7147, National Bureau of Economic Research, Inc.
  28. Tetlow, Robert J. & von zur Muehlen, Peter, 2001. "Simplicity versus optimality: The choice of monetary policy rules when agents must learn," Journal of Economic Dynamics and Control, Elsevier, vol. 25(1-2), pages 245-279, January.
  29. Bennett T. McCallum, 1981. "On Non-Uniqueness in Rational Expectations Models: An Attempt at Perspective," NBER Working Papers 0684, National Bureau of Economic Research, Inc.
  30. repec:sae:niesru:v:118:y::i:1:p:82-88 is not listed on IDEAS
  31. Bruce McGough & George Evans, 2004. "Optimal Constrained Interest Rate Rules," Computing in Economics and Finance 2004 134, Society for Computational Economics.
  32. Kaushik Mitra & James Bullard, "undated". "Learning About Monetary Policy Rules," Discussion Papers 00/41, Department of Economics, University of York.
  33. Nicoletta Batini & Joseph Pearlman, 2002. "Too Much Too Soon: Instability and Indeterminacy with Forward-Looking Rules," Discussion Papers 08, Monetary Policy Committee Unit, Bank of England.
  34. Onatski, Alexei & Williams, Noah, 2002. "Modeling model uncertainty," Working Paper Series 0169, European Central Bank.
  35. N/A, 1986. "Chapter I. The Home Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 116(1), pages 5-18, May.
  36. Garratt, Anthony & Hall, Stephen G., 1997. "E-equilibria and adaptive expectations: Output and inflation in the LBS model," Journal of Economic Dynamics and Control, Elsevier, vol. 21(7), pages 1149-1171, June.
  37. 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.
  38. Robert Tetlow & Peter von zur Muehlen, 2004. "Avoiding Nash Inflation: Bayesian and Robus Responses to Model Uncertainty," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 7(4), pages 869-899, October.
  39. N/A, 1986. "Seasonal Patterns in the British Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 117(1), pages 33-42, August.
  40. James Bullard & Kaushik Mitra, "undated". "Determinacy, Learnability, and Monetary Policy Inertia," Discussion Papers 00/43, Department of Economics, University of York.
  41. Marvin Goodfriend & Robert G. King, 1998. "The new neoclassical synthesis and the role of monetary policy," Working Paper 98-05, Federal Reserve Bank of Richmond.
  42. Bray, Margaret M & Savin, Nathan E, 1986. "Rational Expectations Equilibria, Learning, and Model Specification," Econometrica, Econometric Society, vol. 54(5), pages 1129-1160, September.
  43. Giordani, Paolo & Söderlind, Paul, 2002. "Solution of Macromodels with Hansen-Sargent Robust Policies: Some Extensions," SSE/EFI Working Paper Series in Economics and Finance 499, Stockholm School of Economics, revised 15 May 2003.
  44. James B. Bullard & Stefano Eusepi, 2003. "Did the Great Inflation occur despite policymaker commitment to a Taylor rule?," FRB Atlanta Working Paper 2003-20, Federal Reserve Bank of Atlanta.
  45. N/A, 1986. "Chapter I. The Home Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 118(1), pages 6-17, November.
  46. Volker Wieland & Andrew Levin & John C. Williams, 1999. "The Performance of Forward-Looking Monetary Policy Rules under Model Uncertainty," Computing in Economics and Finance 1999 1153, Society for Computational Economics.
  47. Prachowny,Martin F. J., 1986. "Money in the Macroeconomy," Cambridge Books, Cambridge University Press, number 9780521315944, October.
  48. Latsis,, 1980. "Method and Appraisal in Economics," Cambridge Books, Cambridge University Press, number 9780521280501, October.
  49. N/A, 1980. "Calendar of Economic Events April—June 1980," National Institute Economic Review, National Institute of Economic and Social Research, vol. 93(1), pages 80-82, August.
  50. N/A, 1980. "Chapter III. The World Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 94(1), pages 47-61, November.
  51. Michael Woodford, 2003. "Optimal Interest-Rate Smoothing," Review of Economic Studies, Oxford University Press, vol. 70(4), pages 861-886.
  52. N/A, 1986. "Chapter II. The World Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 116(1), pages 19-30, May.
  53. Julio Rotemberg & Michael Woodford, 1997. "An Optimization-Based Econometric Framework for the Evaluation of Monetary Policy," NBER Chapters, in: NBER Macroeconomics Annual 1997, Volume 12, pages 297-361 National Bureau of Economic Research, Inc.
  54. 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.
  55. Bray, Margaret, 1982. "Learning, estimation, and the stability of rational expectations," Journal of Economic Theory, Elsevier, vol. 26(2), pages 318-339, April.
  56. Taylor, John B., 1993. "Discretion versus policy rules in practice," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 39(1), pages 195-214, December.
  57. Blanchard, Olivier Jean & Kahn, Charles M, 1980. "The Solution of Linear Difference Models under Rational Expectations," Econometrica, Econometric Society, vol. 48(5), pages 1305-1311, July.
  58. N/A, 1986. "Chapter I. The Home Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 117(1), pages 5-19, August.
  59. Ben S. Bernanke & Julio J. Rotemberg, 1997. "NBER Macroeconomics Annual 1997, Volume 12," NBER Books, National Bureau of Economic Research, Inc, number bern97-1, Enero.
  60. N/A, 1980. "Chapter II. The Home Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 94(1), pages 31-46, November.
  61. N/A, 1980. "Chapter III. The World Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 91(1), pages 43-67, February.
  62. N/A, 1986. "Chapte II. the World Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 115(1), pages 27-43, February.
  63. N/A, 1986. "Chapter I. the Home Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 115(1), pages 6-26, February.
  64. Kenneth Rogoff, 1985. "The Optimal Degree of Commitment to an Intermediate Monetary Target," The Quarterly Journal of Economics, Oxford University Press, vol. 100(4), pages 1169-1189.
  65. N/A, 1980. "Chapter I. The World Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 92(1), pages 6-17, May.
  66. Marcet, Albert & Sargent, Thomas J., 1989. "Convergence of least squares learning mechanisms in self-referential linear stochastic models," Journal of Economic Theory, Elsevier, vol. 48(2), pages 337-368, August.
  67. Thomas Lubik & Frank Schorfheide, 2002. "Testing for Indeterminacy:An Application to U.S. Monetary Policy," Economics Working Paper Archive 480, The Johns Hopkins University,Department of Economics, revised Jun 2003.
  68. Walsh, Carl E., 2005. "Parameter misspecification and robust monetary policy rules," Working Paper Series 0477, European Central Bank.
  69. Lubik, Thomas A. & Schorfheide, Frank, 2003. "Computing sunspot equilibria in linear rational expectations models," Journal of Economic Dynamics and Control, Elsevier, vol. 28(2), pages 273-285, November.
  70. N/A, 1986. "Chapter II. The World Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 118(1), pages 18-29, November.
  71. N/A, 1980. "Chapter III. The World Economy," National Institute Economic Review, National Institute of Economic and Social Research, vol. 93(1), pages 36-48, August.
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