How does a citizen's decision to participate in political activism depend on the participation of others? We examine this core question of collective action in a nation-wide natural field experiment in collaboration with a major European party during a recent national election. In a seemingly...

How does a citizen's decision to participate in political activism depend on the participation of others? We conduct a nation-wide natural field experiment in collaboration with a major European party during a recent national election. In a party survey, we randomly provide canvassers with true...

How does a citizen's decision to participate in political activism depend on the participation of others? We conduct a nation-wide natural field experiment in collaboration with a major European party during a recent national election. In a seemingly unrelated survey, we randomly provide...

"The market for ideas" is placed by scholars and commoners between literary metaphors and catchy paraphrases. However, economics and political science, in addition to the sciences of cognition and communication, have at least something to say about the concept. The marketplaces of ideas entail a...

Conventional theory explains moral hazard as a consequence of information asymmetries. The present paper proposes an alternative approach. We argue that information asymmetries are just one among several causes of moral hazard and that they entail negative consequences for third parties only...