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Learning and Equilibrium Selection in a Monetary Overlapping Generations Model with Sticky

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Abstract

PricesThis paper studies the properties of adaptive learning as a device to select amongst the rational expectations equilibria of a monetary overlapping generations model. It extends previous contributions by introducing monopolistic competition and improves upon them by analyzing learning in a model with a well-defined temporary equilibrium map, a coherent informational setup, and properly specified microfoundations. The main result is that adaptive learning is a robust selection mechanism that independent from the degree of imperfect competition always selects the same equilibrium. The indeterminate steady state and the non-stationary equilibria are never stable. The determinate low inflation steady state is the unique stable equilibrium; however, depending on how agents forecast, stability is found to be related to observable characteristics of the economy.

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Bibliographic Info

Paper provided by Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy in its series CSEF Working Papers with number 69.

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Date of creation: 01 Sep 2001
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Publication status: Published in Review of Economic Studies, 2003, vol. 70, pages 887-908
Handle: RePEc:sef:csefwp:69

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Keywords: adaptive learning; equilibrium selection; rational expectations; indeterminacy; stability;

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  1. Jordi Gali & Mark Gertler, 2000. "Inflation Dynamics: A Structural Econometric Analysis," NBER Working Papers 7551, National Bureau of Economic Research, Inc.
  2. 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.
  3. Ramon Marimon & Shyam Sunder, 1993. "Indeterminacy of equilibria in a hyperinflationary world: Experimental evidence," Economics Working Papers 25, Department of Economics and Business, Universitat Pompeu Fabra.
  4. Dixit, Avinash K & Stiglitz, Joseph E, 1975. "Monopolistic Competition and Optimum Product Diversity," The Warwick Economics Research Paper Series (TWERPS) 64, University of Warwick, Department of Economics.
  5. Lettau, M. & Van Zandt, T., 1995. "Robustness of Adaptive Expections as an Equilibrium Selection Device," Papers 9598, Tilburg - Center for Economic Research.
  6. Duffy John, 1994. "On Learning and the Nonuniqueness of Equilibrium in an Overlapping Generations Model with Fiat Money," Journal of Economic Theory, Elsevier, vol. 64(2), pages 541-553, December.
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Cited by:
  1. Adam, Klaus & Marcet, Albert & Nicolini, Juan Pablo, 2007. "Stock Market Volatility and Learning," CEPR Discussion Papers 6518, C.E.P.R. Discussion Papers.

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