Laws and other formal rules are ‘obligations backed by incentives’. In this paper we explore how formal rules affect cooperative behavior. Our analysis is based on a series of experimental public good games designed to isolate the impact of exogenously requested minimum contributions...

It is a widely accepted conclusion of the economic literature on optimal law enforcement that nonmonetary sanctions should be introduced only when fines have been used up to their maximum extent. In this paper it is shown that when the sanctioning policy conveys information about the harmfulness...