Endogenous Preferences and Conformity: Evidence From a Pilot Experiment

Beraldo, Sergio and Filoso, Valerio and Marco, Stimolo (2013): Endogenous Preferences and Conformity: Evidence From a Pilot Experiment.

Abstract

Conformity behavior, i.e. the agreement between an individual's choices and the prevailing behavior of a reference group, is a commonly observed phenomenon. Though some types of social interactions may give raise to specific incentives to adopt either a majoritarian or a contrarian behavior, we want to investigate whether the same behavioral pattern emerges even when no economic motivator is present. To accomplish this task, we employ an experimental Vickrey median price auction designed to provide incentives to reveal individual preferences truthfully. Whereas we feed the control group with just the median price, we give out additional information on other players' bids for those in the treated groups. These informations are designed to provide hints at revising individual bids. Our main results point to a strong tendency of the individuals to adapt their behavior to those of the individuals which can be observed. Moreover, although a clear shaping effect (a regression toward the median price) does emerge for the control group, the provision of information about the actual behavior of a sample of the relevant group is able to minimize or neutralize the shaping effect. Specifically, we find that players adjust to a divergence between their bids and the average bid of a reference group by a factor of 47.4\%—87.3\%. These figures point to a relevant role for conformity in group behavior.

• Item Type: MPRA Paper
• Language: English
• Keywords: Endogenous preferences, shaping effect, social conformity, Vickrey auction
• Subjects: C - Mathematical and Quantitative Methods > C9 - Design of Experiments > C91 - Laboratory, Individual Behavior; C - Mathematical and Quantitative Methods > C9 - Design of Experiments > C92 - Laboratory, Group Behavior; D - Microeconomics > D4 - Market Structure, Pricing, and Design > D44 - Auctions

References

Allais, M. (1953): “Le Comportement de l’Homme Rationnel devant le Risque: Critique des Postulats et Axiomes de l’Ecole Américaine,” Econometrica, 21(4), 503–546.

Ariely, D., G. Loewenstein, and D. Prelec (2003): “’Coherent arbitrari- ness’: Stable demand curves without stable preferences,” The Quarterly Journal of Economics, 118(1), 73–106.

Asch, S. E. (1956): “Studies of independence and conformity: I. A minority of one against a unanimous majority,” Psychological Monographs: General and Applied, 70(9), 1–70.

Bernheim, B. D. (1998): “A Theory of Conformity,” Journal of Political Econ- omy, 102(5), 841–77.

Bikhchandani, S., D. Hirshleifer, and I. Welch (1998): “Learning from the behavior of others: Conformity, fads, and informational cascades,” The Journal of Economic Perspectives, 12(3), 151–170.

Butler, D. J., and G. C. Loomes (2007): “Imprecision as an Account of the Preference Reversal Phenomenon,” American Economic Review, 97(1), 277–297.

Efferson, C., R. Lalive, P. J. Richerson, R. McElreath, and M. Lubell (2008): “Conformists and mavericks: The empirics of frequency- dependent cultural transmission,” Evolution and Human Behavior, 29(1), 56–64.

Haun, D., E. van Leeuwen, M. Edelson, et al. (2013): “Majority influence in children and other animals.,” Developmental cognitive neuroscience, 3, 61–71.

Kahneman, D., and A. Tversky (1979): “Prospect Theory: An Analysis of Decision under Risk,” Econometrica, 47(2), 263–291.

Klick, J., and F. Parisi (2008): “Social networks, self-denial, and median pref- erences: Conformity as an evolutionary strategy,” Journal of Socio-Economics, 37(4), 1319–1327.

Loomes, G., C. Starmer, and R. Sugden (2003): “Do Anomalies Disappear in Repeated Markets?,” The Economic Journal, 113(486), C153–C166. (2010): “Preference reversals and disparities between willingness to pay and willingness to accept in repeated markets,” Journal of Economic Psychology, 31(3), 374–387.  Morgan, T. J. H., and K. N. Laland (2012): “The Biological Bases of Con- formity,” Frontiers in Neuroscience, 6, 87.

Plott, C. R. (1996): “Rational Individual Behaviour in Markets and Social Choice Processes,” in The Rational Foundations of Economic Behaviour: Pro- ceedings of the IEA Conference Held in Turin, Italy, ed. by K. J. Arrow, E. Colombatto, M. Perlman, and C. Schmidt. Macmillan.

Tufano, F. (2010): “Are ‘true’preferences revealed in repeated markets? An ex- perimental demonstration of context-dependent valuations,” Experimental Eco- nomics, 13(1), 1–13.

van de Waal, E., C. Borgeaud, A. Whiten, T. Inomata, D. Triadan, K. Aoyama, V. Castillo, H. Yonenobu, Y. Chen, G. W. Dorn, et al. (2013): “Potent Social Learning and Conformity Shape a Wild Primate’s For- aging Decisions,” Science, 340(6131), 483–485.

Vickrey, W. (1961): “Counterspeculation, auctions, and competitive sealed ten- ders,” The Journal of Finance, 16(1), 8–37.