We study a laboratory social dilemma game in which incentives to steal from others lead to the socially inefficient diversion of resources from production unless the members of a given mini-society can abide by norms of non-theft or engage in low cost collective protection of their members'...

We study the effect of voting when insiders ́public goods provision may affect passive outsiders. Without voting insiders ́contributions do not differ, regardless of whether outsiders are positively or negatively affected or even unaffected. Voting on the recommended contribution level...

It is still an open question when groups perform better than individuals in intellective tasks. We report that in an Acquiring a Company game, what prevailed when there was disagreement among group members was the median proposal and not the best proposal. This aggregation rule explains why...

Entrusting the power to punish to a central authority is a hallmark of civilization. We study a collective action dilemma in which self‐interest should produce a sub‐optimal outcome absent sanctions for non‐cooperation. We then test experimentally whether subjects make the theoretically...

The sanctioning of norm-violating behavior by an effective formal authority is an efficient solution for social dilemmas. It is in the self-interest of voters and is often favorably contrasted with letting citizens take punishment into their own hands. Allowing informal sanctions, by contrast,...