Learning and Equilibrium Selection in a Monetary Overlapping Generations Model with Sticky Prices
We study adaptive learning in a monetary overlapping generations model with sticky prices and monopolistic competition for the case where learning agents observe current endogenous variables. Observability of current variables is essential for informational consistency of the learning setup with the model set up but generates multiple temporary equilibria when prices are flexible and prevents a straightforward construction of the learning dynamics. Sticky prices overcome this problem by avoiding simultaneity between prices and price expectations. Adaptive learning then robustly selects the determinate (monetary) steady state independent from the degree of imperfect competition. The indeterminate (non-monetary) steady state and non-stationary equilibria are never stable. Stability in a deterministic version of the model may differ because perfect foresight equilibria can be the limit of restricted perceptions equilibria of the stochastic economy with vanishing noise and thereby inherit different stability properties. This discontinuity at the zero variance of shocks suggests to analyze learning in stochastic models.
|Date of creation:||2003|
|Date of revision:|
|Contact details of provider:|| Postal: House of Finance, Grüneburgplatz 1, HPF H5, D-60323 Frankfurt am Main|
Phone: +49 (0)69 798-30050
Fax: +49 (0)69 798-30077
Web page: http://www.ifk-cfs.de/
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- 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.
- Lettau, Martin & Van Zandt, Timothy, 2001.
"Robustness of Adaptive Expectations as an Equilibrium Selection Device,"
CEPR Discussion Papers
2882, C.E.P.R. Discussion Papers.
- Lettau, M. & Van Zandt, T., 1995. "Robustness of Adaptive Expections as an Equilibrium Selection Device," Papers 9598, Tilburg - Center for Economic Research.
- 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.
- Klaus Adam, 2002. "Adaptive Learning and Cyclical Behavior of Output and Inflation," Macroeconomics 0211013, EconWPA.
When requesting a correction, please mention this item's handle: RePEc:zbw:cfswop:200303. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (ZBW - German National Library of Economics)
If references are entirely missing, you can add them using this form.