Conformity, Information and Truthful Voting

We induce conformity in a binary-decision voting game by assuming that agents may derive some utility by voting the same option that others. Theoretically, we show that truthful voting is the unique equilibrium without conformity. Introducing conformity enlarges the set of equilibria, which includes voting profiles in which agents do not necessarily vote for their preferred option. If agents are informed that others will vote truthfully, truthful voting is more pervasive in equilibrium. In our setting, the effects of conformity and information depend on the voting rule and the preferred option of each agent. We provide empirical support for our theoretical predictions by means of a laboratory experiment.