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From imitation to collusion: a replication

Published online by Cambridge University Press:  17 January 2025

Jörg Oechssler ,
Alex Roomets  and
Stefan Roth
Jörg Oechssler*
Affiliation:
Department of Economics, University of Heidelberg, Bergheimer Str.58, 69115 Heidelberg, Germany
Alex Roomets*
Affiliation:
Franklin and Marshall College, Lancaster, PA, USA
Stefan Roth*
Affiliation:
Universitat Pompeu Fabra, Barcelona, Spain
*
e-mail: oechssler@uni-hd.de
roomets@gmail.com
stefan.roth@upf.edu
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Abstract

In oligopoly, imitating the most successful competitor yields very competitive outcomes. This theoretical prediction has been confirmed experimentally by a number of studies. A recent paper by Friedman et al. (J Econ Theory 155:185–205, 2015) qualifies those results in an interesting way: While they replicate the very competitive results for the first 25–50 periods, they show that when using a much longer time horizon of 1200 periods, results slowly turn to more and more collusive outcomes. We replicate their result for duopolies. However, with 4 firms, none of our oligopolies becomes permanently collusive. Instead, the average quantity always stays above the Cournot–Nash equilibrium quantity. Thus, it seems that “four remain many” even with 1200 periods.

Keywords

ImitationExperimentCournot oligopolyWalrasian outcome

JEL classification

D74: Conflict • Conflict Resolution • Alliances • Revolutions C91: Laboratory, Individual Behavior C72: Noncooperative Games

Information

Type
Replication Paper
Information
Journal of the Economic Science Association , Volume 2 , Issue 1 , May 2016 , pp. 13 - 21
Copyright
Copyright © Economic Science Association 2016

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Footnotes

Electronic supplementary material The online version of this article (doi:10.1007/s40881-015-0019-x) contains supplementary material, which is available to authorized users.

References

Apesteguia, J., Huck, S., Oechssler, J., Weidenholzer, S. (2010). Imitation and the evolution of Walrasian behavior: Theoretically fragile but behaviorally robust. Journal of Economic Theory, 145, 1603–1617. 10.1016/j.jet.2010.02.014CrossRefGoogle Scholar
Apesteguia, J., Huck, S., Oechssler, J. (2007). Imitation—Theory and experimental evidence. Journal of Economic Theory, 136, 217–235. 10.1016/j.jet.2006.07.006CrossRefGoogle Scholar
Bigoni, M., Fort, M. (2013). Information and learning in oligopoly: An experiment. Games and Economic Behavior, 81, 192–214. 10.1016/j.geb.2013.05.006CrossRefGoogle Scholar
Bigoni, M., Casari, M., Skrzypacz, A., Spagnolo, G. (2015). Time horizon and cooperation in continuous time. Econometrica, 83, 587–616. 10.3982/ECTA11380CrossRefGoogle Scholar
Fischbacher, U. (2007). z-Tree: Zurich toolbox for ready-made economic experiments. Experimental Economics, 10, 171–178. 10.1007/s10683-006-9159-4CrossRefGoogle Scholar
Friedman, D., Huck, S., Oprea, R., Weidenholzer, S. (2015). From imitation to collusion: Long-run learning in a low-information environment. Journal of Economic Theory, 155, 185–205. 10.1016/j.jet.2014.10.006CrossRefGoogle Scholar
Greiner, B. (2015). Subject pool recruitment procedures: Organizing experiments with ORSEE. Journal of the Economic Science Association, 1(1), 114–125. 10.1007/s40881-015-0004-4CrossRefGoogle Scholar
Huck, S., Normann, H.-T., Oechssler, J. (1999). Learning in Cournot oligopoly: An experiment. Economic Journal, 109, C80–C95. 10.1111/1468-0297.00418CrossRefGoogle Scholar
Huck, S., Normann, H.-T., Oechssler, J. (2003). Zero-knowledge cooperation in dilemma games. Journal of Theoretical Biology, 220(1), 47–54. 10.1006/jtbi.2003.3129CrossRefGoogle ScholarPubMed
Huck, S., Normann, H.-T., Oechssler, J. (2004). Two are few and four are many: Number effects in experimental oligopoly. Journal of Economic Behavior and Organization, 53, 435–446. 10.1016/j.jebo.2002.10.002CrossRefGoogle Scholar
Huck, S., Normann, H.-T., Oechssler, J. (2004). Through trial and error to collusion. International Economic Review, 45(1), 205–224. 10.1111/j.1468-2354.2004.00122.xCrossRefGoogle Scholar
Offerman, T., Potters, J., Sonnemans, J. (2002). Imitation and belief learning in an oligopoly experiment. Review of Economic Studies, 69, 973–997. 10.1111/1467-937X.00233CrossRefGoogle Scholar
Vega-Redondo, F. (1997). The evolution of Walrasian behavior. Econometrica, 65, 375–384. 10.2307/2171898CrossRefGoogle Scholar
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