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No 2009:148:
Social Norms, Information and Trust among Strangers: Theory and Evidence

John Duffy (), Huan Xieb () and Yong-Ju Leec ()
Additional contact information
John Duffy: University of Pittsburgh
Huan Xieb: Concordia University
Yong-Ju Leec: Samsung Research Institute of Finance

Abstract: How do norms of trust and reciprocity arise? We investigate this question by examining behavior in an experiment where subjects play a series of indefinitely repeated trust games. Players are randomly and anonymously matched each period. The parameters of the game are chosen so as to support trust and reciprocity as a sequential equilibrium when no reputational information is available. The main questions addressed are whether a social norm of trust and reciprocity emerges under the most extreme information restriction (community-wide enforcement) or whether trust and reciprocity require additional, individual-specific information about a player’s past history of play and how long that history must be. In the absence of such reputational information, we find that a social norm of trust and reciprocity is difficult to sustain. The provision of reputational information on past individual decisions significantly increases trust and reciprocity, with longer histories yielding the best outcomes. Importantly, we find that making reputational information available at a small cost may also lead to a significant improvement in trust and reciprocity, despite the fact that most subjects do not choose to purchase this information.

Keywords: Social Norms; Trust Game; Random Matching; Trust and Reciprocity; Information; Reputational Mechanisms.

Language: English

44 pages, 2009

Note: Available online at: http://www.econ.pitt.edu/papers/John_truststrangersAER.pdf

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RePEc:hhh:senior:2009_148 This page was generated 2009-11-02 09:57:00