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Macroeconomic Modeling when Agents are Imperfectly Informed

  • Paul De Grauwe
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    DSGE-models have become important tools of analysis not only in academia but increasingly in the board rooms of central banks. The success of these models has much to do with the coherence of the intellectual framework it provides. The limitations of these models come from the fact that they make very strong assumptions about the cognitive abilities of agents in understanding the underlying model. In this paper we relax this strong assumption. We develop a stylized DSGE-model in which individuals use simple rules of thumb (heuristics) to forecast the future inflation and output gap. We compare this model with the rational expectations version of the same underlying model. We find that the dynamics predicted by the heuristic model differs from the rational expectations version in some important respects, in particular in their capacity to produce endogenous economic cycles.

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    File URL: http://www.cesifo-group.de/portal/page/portal/DocBase_Content/WP/WP-CESifo_Working_Papers/wp-cesifo-2008/wp-cesifo-2008-06/cesifo1_wp2318.pdf
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    Paper provided by CESifo Group Munich in its series CESifo Working Paper Series with number 2318.

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    Date of creation: 2008
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    Handle: RePEc:ces:ceswps:_2318
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    1. Lawrence J. Christiano & Martin Eichenbaum & Charles L. Evans, 2001. "Nominal rigidities and the dynamic effects of a shock to monetary policy," Working Paper Series WP-01-08, Federal Reserve Bank of Chicago.
    2. De Long, J. Bradford & Shleifer, Andrei & Summers, Lawrence H. & Waldmann, Robert J., 1990. "Noise Trader Risk in Financial Markets," Scholarly Articles 3725552, Harvard University Department of Economics.
    3. Clarida, Richard & Galí, Jordi & Gertler, Mark, 1999. "The Science of Monetary Policy: A New Keynesian Perspective," CEPR Discussion Papers 2139, C.E.P.R. Discussion Papers.
    4. Branch, William A. & Evans, George W., 2006. "Intrinsic heterogeneity in expectation formation," Journal of Economic Theory, Elsevier, vol. 127(1), pages 264-295, March.
    5. Svensson, Lars E O, 1996. "Inflation Forecast Targeting: Implementing and Monitoring Inflation Targets," CEPR Discussion Papers 1511, C.E.P.R. Discussion Papers.
    6. Galí, Jordi & Lopez-Salido, Jose David & Vallés Liberal, Javier, 2004. "Rule-of-Thumb Consumers and the Design of Interest Rate Rules," CEPR Discussion Papers 4347, C.E.P.R. Discussion Papers.
    7. Stefano DellaVigna, 2009. "Psychology and Economics: Evidence from the Field," Journal of Economic Literature, American Economic Association, vol. 47(2), pages 315-72, June.
    8. Alexis Anagnostopoulos & Omar Licandro & Italo Bove & Karl Schlag, 2007. "An Evolutionary Theory of Inflation Inertia," Journal of the European Economic Association, MIT Press, vol. 5(2-3), pages 433-443, 04-05.
    9. Brock, W.A., 1995. "A Rational Route to Randomness," Working papers 9530, Wisconsin Madison - Social Systems.
    10. Nelson, E., 1998. "Sluggish inflation and optimizing models of the business cycle," Journal of Monetary Economics, Elsevier, vol. 42(2), pages 303-322, July.
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