Learning in Cobweb Experiments
AbstractDifferent theories of expectation formation and learning usually yield different outcomes for realized market prices in dynamic models. The purpose of this paper is to investigate expectation formation and learning in a controlled experimental environment. Subjects are asked to predict the next period's aggregate price in a dynamic commodity market model with feedback from individual expectations. Subjects have no information about underlying market equilibrium equations, but can learn by observing past price realizations and predictions. We conduct a stable, an unstable, and a strongly unstable treatment. In the stable treatment, rational expectations (RE) yield a good description of observed aggregate price fluctuations: prices remain close to the RE steady state. In the unstable treatments, prices exhibit large fluctuations around the RE steady state. Although the sample mean of realized prices is close to the RE steady state, the amplitude of the price fluctuations as measured by the variance is significantly larger than the amplitude under RE, implying persistent excess volatility. However, agents' forecasts are boundedly rational in the sense that fluctuations in aggregate prices are unpredictable and exhibit no forecastable structure that could easily be exploited. This discussion paper has resulted in a publication in Macroeconomic Dynamics , 2007, 11, Supplement S1, 8-33.
Download InfoIf you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
Bibliographic InfoPaper provided by Tinbergen Institute in its series Tinbergen Institute Discussion Papers with number 03-020/1.
Date of creation: 11 Mar 2003
Date of revision:
Contact details of provider:
Web page: http://www.tinbergen.nl
expectations; learning; cobweb dynamics; excess volatility.;
Other versions of this item:
- C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior
- D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations
- E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
This paper has been announced in the following NEP Reports:
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.:
- R. Guesnerie, 2002.
"Anchoring Economic Predictions in Common Knowledge,"
Econometric Society, vol. 70(2), pages 439-480, March.
- Guesnerie, R., 1999. "Anchoring Economic Predictions in Common Knowledge," DELTA Working Papers 1999-06, DELTA (Ecole normale supérieure).
- Arifovic, Jasmina, 1994. "Genetic algorithm learning and the cobweb model," Journal of Economic Dynamics and Control, Elsevier, vol. 18(1), pages 3-28, January.
- Hommes, Cars & Sorger, Gerhard, 1998. "Consistent Expectations Equilibria," Macroeconomic Dynamics, Cambridge University Press, vol. 2(03), pages 287-321, September.
- Hommes, Cars H., 1994. "Dynamics of the cobweb model with adaptive expectations and nonlinear supply and demand," Journal of Economic Behavior & Organization, Elsevier, vol. 24(3), pages 315-335, August.
- Kirman, A., 1997.
"Interaction and Markets,"
97a02, Universite Aix-Marseille III.
- Marimon, R. & Spear, S. & Sunder, S., 1991.
"Expectationally-Driven Market Volatility: An Experimental Study,"
GSIA Working Papers
1991-3, Carnegie Mellon University, Tepper School of Business.
- Marimon Ramon & Spear Stephen E. & Sunder Shyam, 1993. "Expectationally Driven Market Volatility: An Experimental Study," Journal of Economic Theory, Elsevier, vol. 61(1), pages 74-103, October.
- Ramon Marimon & Stephen E. Spear & Shyam Sunder, 1993. "Expectationally-driven market volatility: An experimental study," Economics Working Papers 21, Department of Economics and Business, Universitat Pompeu Fabra.
- Ramon Marimon & Stephen E. Spear & Shyam Sunder, 1992. "Expectationally-driven market volatility: an experimental study," Discussion Paper / Institute for Empirical Macroeconomics 73, Federal Reserve Bank of Minneapolis.
- repec:att:wimass:9530 is not listed on IDEAS
- Hugh Kelley & Daniel Friedman, 2002. "Learning to Forecast Price," Economic Inquiry, Western Economic Association International, vol. 40(4), pages 556-573, October.
- Robert J. Shiller, 1980.
"Do Stock Prices Move Too Much to be Justified by Subsequent Changes in Dividends?,"
NBER Working Papers
0456, National Bureau of Economic Research, Inc.
- 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.
- 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.
- William A. Brock & Cars H. Hommes, 1997.
"A Rational Route to Randomness,"
Econometric Society, vol. 65(5), pages 1059-1096, September.
- Chiarella, Carl, 1988. "The cobweb model: Its instability and the onset of chaos," Economic Modelling, Elsevier, vol. 5(4), pages 377-384, October.
- Grandmont Jean-michel & Laroque G, 1990. "Economic dynamics with learning : some instability examples," CEPREMAP Working Papers (Couverture Orange) 9007, CEPREMAP.
- Frankel, Jeffrey A & Froot, Kenneth A, 1987.
"Using Survey Data to Test Standard Propositions Regarding Exchange Rate Expectations,"
American Economic Review,
American Economic Association, vol. 77(1), pages 133-53, March.
- Frankel, Jeff & Froot, Ken, 1986. "Using Survey Data to Test Standard Propositions Regarding Exchange Rate Expectations," Department of Economics, Working Paper Series qt1972q8wm, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
- Cars Hommes & Joep Sonnemans & Jan Tuinstra & Henk van de Velden, 2005.
"Coordination of Expectations in Asset Pricing Experiments,"
Review of Financial Studies,
Society for Financial Studies, vol. 18(3), pages 955-980.
- Cars Hommes & Joep Sonnemans & Jan Tuinstra & Henk van de Velden, 2004. "Coordination of Expectations in Asset Pricing Experiments," DNB Staff Reports (discontinued) 119, Netherlands Central Bank.
- Cars Hommes & Joep Sonnemans & Jan Tuinstra & Henk van de Velden, 2003. "Coordination of Expectations in Asset Pricing Experiments," Tinbergen Institute Discussion Papers 03-010/1, Tinbergen Institute.
- Smith, Vernon L & Suchanek, Gerry L & Williams, Arlington W, 1988. "Bubbles, Crashes, and Endogenous Expectations in Experimental Spot Asset Markets," Econometrica, Econometric Society, vol. 56(5), pages 1119-51, September.
- Guesnerie, Roger, 1992.
"An Exploration of the Eductive Justifications of the Rational-Expectations Hypothesis,"
American Economic Review,
American Economic Association, vol. 82(5), pages 1254-78, December.
- Guesnerie, R., 1989. "An Exploration of the Eductive Justifications of the Rational Expectations Hypotbesis," DELTA Working Papers 89-24, DELTA (Ecole normale supérieure).
- 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.
- Marimon, Ramon & Sunder, Shyam, 1993. "Indeterminacy of Equilibria in a Hyperinflationary World: Experimental Evidence," Econometrica, Econometric Society, vol. 61(5), pages 1073-107, September.
- Jeffrey A. Frankel & Kenneth A. Froot, 1987. "Using Survey Data to Test Some Standard Propositions Regarding Exchange Rate Expectations," NBER Working Papers 1672, National Bureau of Economic Research, Inc.
- Hey, John D., 1994. "Expectations formation: Rational or adaptive or ...?," Journal of Economic Behavior & Organization, Elsevier, vol. 25(3), pages 329-349, December.
This item has more than 25 citations. To prevent cluttering this page, these citations are listed on a separate page. reading list or among the top items on IDEAS.Access and download statisticsgeneral 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: (Antoine Maartens (+31 626 - 160 892)).
If references are entirely missing, you can add them using this form.