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Macroeconomic Modeling when Agents are Imperfectly Informed

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  • Paul De Grauwe
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    Abstract

    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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    Bibliographic Info

    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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    Related research

    Keywords: DSGE-model; imperfect information; heuristics; animal spirits;

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    1. De Long, J Bradford & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, 1990. "Noise Trader Risk in Financial Markets," Journal of Political Economy, University of Chicago Press, vol. 98(4), pages 703-38, August.
    2. Svensson, Lars E.O., 1997. "Inflation Forecast Targeting: Implementing and Monitoring Inflation Targets," Seminar Papers 615, Stockholm University, Institute for International Economic Studies.
    3. Brock, W.A., 1995. "A Rational Route to Randomness," Working papers 9530, Wisconsin Madison - Social Systems.
    4. Alexis Anagnostopoulos & Italo Bove & Karl Schlag & Omar Licandro, 2006. "An Evolutionary Theory of Inflation Inertia," Working Papers 2006-25, FEDEA.
    5. Nelson, E., 1998. "Sluggish inflation and optimizing models of the business cycle," Journal of Monetary Economics, Elsevier, vol. 42(2), pages 303-322, July.
    6. 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.
    7. Branch, William A. & Evans, George W., 2006. "Intrinsic heterogeneity in expectation formation," Journal of Economic Theory, Elsevier, vol. 127(1), pages 264-295, March.
    8. 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.
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    Cited by:
    1. Heinz-Peter Spahn, 2009. "The New Keynesian Microfoundations of Macroeconomics," Diskussionspapiere aus dem Institut für Volkswirtschaftslehre der Universität Hohenheim 317/2009, Department of Economics, University of Hohenheim, Germany.

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