Using a common pool resource game protocol with voting we examine experimentally how cooperation varies with the level at which (binding) votes are aggregated. Our results are broadly in line with theoretical predictions. When players can vote on the behavior of the whole group or when leaders...

On moral issues, it is well-known that liberals and conservatives often tend to take opposing positions. However, the connection between ideology and positions is not absolute, as evidenced by public opinion moving dramatically on some issues (e.g., gay rights) while not moving on other issues...

In certain economic experiments, some participants willingly pay a cost to punish peers who contribute too little to the public good. Because such punishment can lead to improved group outcomes, this costly punishment has been conceived of as altruistic. Here we provide evidence that individual...