Secret Santa: Anonymity, Signalling, and Conditional Cooperation

David Hugh-Jones () and david A. reinstein ()

Economics Discussion Papers from University of Essex, Department of Economics

Abstract: Costly signalling of commitment to a group has been proposed as an explanation for participation in religion and ritual. But if the signal’s cost is too small, freeriders will send the signal and behave selfishly later. Effective signalling may then be prohibitively costly. If the average level of signalling in a group is observable, but individual effort is not, then freeriders can behave selfishly without being detected, and group members will learn about the average level of commitment among the group. We develop a formal model, and give examples of institutions that enable anonymous signalling, including ritual, religion, music and dance, voting, charitable donations, and military institutions. We explore the value of anonymity in the laboratory with a repeated two-stage public goods game with exclusion. When first-stage contributions are anonymous, subjects are better at predicting second-stage behavior, and maintain a substantially higher level of cooperation.

Date: 2009-07-08
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Working Paper: Secret Santa: Anonymity, Signaling, and Conditional Cooperation (2009)
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