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Near-Rational Exuberance

  • James Bullard


    (Federal Reserve Bank of St. Louis)

  • George W. Evans


    (University of Oregon Economics Department)

  • Seppo Honkapohja


    (University of Cambridge)

We study how the use of judgement or "add-factors" in macroeconomic forecasting may disturb the set of equilibrium outcomes when agents learn using recursive methods. We isolate conditions under which new phenomena, which we call exuberance equilibria, can exist in standard macroeconomic environments. Examples include a simple asset pricing model and the New Keynesian monetary policy framework. Inclusion of judgement in forecasts can lead to self-fulfilling fluctuations, but without the requirement that the underlying rational expectations equilibrium is locally indeterminate. We suggest ways in which policymakers might avoid unintended outcomes by adjusting policy to minimize the risk of exuberance equilibria.

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Paper provided by University of Oregon Economics Department in its series University of Oregon Economics Department Working Papers with number 2005-15.

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Length: 54
Date of creation: 17 Sep 2005
Date of revision: 18 Sep 2006
Handle: RePEc:ore:uoecwp:2005-15
Contact details of provider: Postal: 1285 University of Oregon, 435 PLC, Eugene, OR 97403-1285
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  1. Lars E O Svensson, 2005. "Monetary Policy with Judgment: Forecast Targeting," International Journal of Central Banking, International Journal of Central Banking, vol. 1(1), May.
  2. Roger Lagunoff & Stacey L. Schreft, 1999. "Financial Fragility with Rational and Irrational Exuberance," Macroeconomics 9904011, EconWPA.
  3. Reifschneider, David L. & Stockton, David J. & Wilcox, David W., 1997. "Econometric models and the monetary policy process," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 47(1), pages 1-37, December.
  4. George W. Evans & Seppo Honkapohja, 2003. "Expectations and the Stability Problem for Optimal Monetary Policies," Review of Economic Studies, Oxford University Press, vol. 70(4), pages 807-824.
  5. Evans, George W. & Honkapohja, Seppo, 2003. "Adaptive Learning and Monetary Policy Design," CEPR Discussion Papers 3962, C.E.P.R. Discussion Papers.
  6. Lars O. Svensson & Robert J. Tetlow, 2005. "Optimal Policy Projections," NBER Working Papers 11392, National Bureau of Economic Research, Inc.
  7. repec:cup:macdyn:v:2:y:1998:i:3:p:287-321 is not listed on IDEAS
  8. Hommes, Cars & Sorger, Gerhard, 1998. "Consistent Expectations Equilibria," Macroeconomic Dynamics, Cambridge University Press, vol. 2(03), pages 287-321, September.
  9. Sargent, Thomas J., 1991. "Equilibrium with signal extraction from endogenous variables," Journal of Economic Dynamics and Control, Elsevier, vol. 15(2), pages 245-273, April.
  10. Shiller, Robert J, 1981. "Do Stock Prices Move Too Much to be Justified by Subsequent Changes in Dividends?," American Economic Review, American Economic Association, vol. 71(3), pages 421-36, June.
  11. Thomas Sargent & Noah Williams & Tao Zha, 2006. "The Conquest of South American Inflation," NBER Working Papers 12606, National Bureau of Economic Research, Inc.
  12. Preston, Bruce, 2005. "Learning about Monetary Policy Rules when Long-Horizon Expectations Matter," MPRA Paper 830, University Library of Munich, Germany.
  13. Evans, George W. & Honkapohja, Seppo, 1999. "Learning dynamics," Handbook of Macroeconomics, in: J. B. Taylor & M. Woodford (ed.), Handbook of Macroeconomics, edition 1, volume 1, chapter 7, pages 449-542 Elsevier.
  14. George W. Evans & Seppo Honkapohja, 1998. "Economic Dynamics with Learning: New Stability Results," Review of Economic Studies, Oxford University Press, vol. 65(1), pages 23-44.
  15. Lars E. O. Svensson, 2003. "What is Wrong with Taylor Rules? Using Judgment in Monetary Policy through Targeting Rules," NBER Working Papers 9421, National Bureau of Economic Research, Inc.
  16. Evans, George W. & Honkapohja, Seppo & Honkapohja, Seppo, 1994. "Learning, convergence, and stability with multiple rational expectations equilibria," European Economic Review, Elsevier, vol. 38(5), pages 1071-1098, May.
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