Social preferences can make imperfect sanctions work: Evidence from a public good experiment

Sanctions are often so weak that a money maximizing individual would not be deterred. In this paper I test the hypothesis that imperfect sanctions may nonetheless serve a forward looking purpose if sufficiently many individuals are averse against advantageous inequity. Using a linear public good with centralized punishment, I find that participants increase contributions even if severity had been insufficient to deter a profit-maximizing individual. The more an individual is averse against exploiting others, the less it matters whether punishment was deterrent.