Emotion venting and punishment in public good experiments

Experimental studies have shown that sanctions effectively deter free riding within groups. However, the over-use of costly punishment may actually harm overall welfare. A main reason for over-punishment is that free-riders generate negative emotions that likely favor excessive punishments. In this paper we ask whether the venting of one's emotions in different ways can reduce the level of excessive punishment in a standard VCM-with-punishment environment while preserving the norm enforcement properties of punishment. We find that venting emotions reduces (excessive) punishment, and under certain conditions the net effect is an increase in final payoffs (i.e., welfare) to the group.