When collective ignorance is bliss: Theory and experiment on voting for learning

When do groups and societies choose to be uninformed? We study a committee that needs to vote on a reform which will give every member a private state-dependent payoff. The committee can vote to learn the state at no cost. We show that the committee votes not to learn the state whenever independent voters are more divided than partisans. This implies that groups with conflicting preferences tend to seek less information. A laboratory experiment shows that committees are substantially more likely to vote against acquiring information when the theory predicts them to do so. We also observe deviations from theory that are largely explained by cognitive limitations. At the same time, subjects with more experience or with greater strategic competence are more likely to vote in line with the theory, providing evidence for external validity of the model.We thank Universidad del Rosario for hosting the experiment, and the financial support from Central Bank of Colombia grant 3754, Spanish Ministry of the Economy grant MDM 2014-0431, and Comunidad de Madrid grant S2015/HUM-344