Forming price expectations in positive and negative feedback systems
We analyse the results of an experiment on expectation formation carried out last year (i.e., 2003) in the CREED laboratory in Amsterdam. The experiment involved 78 participants, who were asked to predict prices in artificial single-good economies, and were paid according to their accuracy in doing so. Thirteen markets, with six subjects each, were created, in two different treatments. The first treatment concerns a Cobweb-like commodity market with supply-driven expectations feedback. The second treatment concerns a speculative asset market with demanddriven expectations feedback. In the first treatment price fluctuations are relatively stable, quickly converging to the Rational Expectations fundamental value. In the second treatment prices do not converge quickly, but tend to display a slow oscillation around the fundamental price. An important factor in generating these differences is shown to be the strong coordination of price predictions among participants. This suggests a large degree of homogeneity in the expectation rules applied by the participants, which was confirmed by explicitly fitting the individual predictions to a linear adaptive autoregressive specification.
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- Giulio Bottazzi & Maria Giovanna Devetag, 2003.
"Expectations Structure in Asset Pricing Experiments,"
LEM Papers Series
2003/19, Laboratory of Economics and Management (LEM), Sant'Anna School of Advanced Studies, Pisa, Italy.
- Giulio Bottazzi & Giovanna Devetag, 2003. "Expectations Structure in Asset Pricing Experiments," ROCK Working Papers 022, Department of Computer and Management Sciences, University of Trento, Italy, revised 12 Jun 2008.
- Giulio Bottazzi & Giovanna Devetag, 2005. "Expectations structure in asset pricing experiments," CEEL Working Papers 0503, Cognitive and Experimental Economics Laboratory, Department of Economics, University of Trento, Italia.
- Lei, V. & Noussair, C. & Plott, C.R., 1998.
"Non-Speculative Bubbles in Experimental Asset Markets: Lack of Common Knowledge of Rationality Vs. Actual Irrationality,"
Purdue University Economics Working Papers
1120, Purdue University, Department of Economics.
- Lei, Vivian & Noussair, Charles N & Plott, Charles R, 2001. "Nonspeculative Bubbles in Experimental Asset Markets: Lack of Common Knowledge of Rationality vs. Actual Irrationality," Econometrica, Econometric Society, vol. 69(4), pages 831-59, July.
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