In small groups norm enforcement is provided by mutual punishment and reward. In large societies we have enforcement institutions. This paper shows how such institutions can emerge as a decentralized equilibrium. In a first stage, individuals invest in a public enforcement technology. This...

This experimental study investigates how behavior changes after punishment for an unkind action. It also studies how fairness perceptions affect the reaction to punishment and whether this effect is consistent across repeated play and role experiences. A repeated version of the power-to-take...

The paper extends the standard tax evasion model by allowing for social interactions. In Manski?s (1993) nomenclature, our model takes into account social conformity effects (i.e., endogenous interactions), fairness effects (i.e., exogenous interactions) and sorting effects (i.e., correlated...

We build a theory of prosocial behavior that combines heterogeneity in individual altruism and greed with concerns for social reputation or self-respect. The presence of rewards or punishments creates doubt as to the true motive for which good deeds are performed, and this 'overjustification...

We consider guilt averse agents and principals and study the effects of guilt on optimal behavior of the principal and the agent in a moral hazard model. The principal's contract proposal contains a target effort in addition to the monetary incentive scheme. By accepting the agreement, the...

Economic and social interaction takes place between individuals with heterogeneous characteristics. We investigate experimentally the emergence and informal enforcement of different contribution norms to a public good in homogeneous and different heterogeneous groups. When punishment is not...

Policies and explicit private incentives designed for self-regarding individuals sometimes are less effective or even counterproductive when they diminish altruism, ethical norms and other social preferences. Evidence from 51 experimental studies indicates that this crowding out effect is...

In line with the widely applied principle of just deserts, we assume that the severity of the penalty on a contract offender increases in the harm on the other. When this principle holds, the influence of the efficiency of the agreement on the incentives to abide by it crucially depends on...

We discuss survey evidence on individuals' willingness to sanction norm violations such as evading taxes, drunk driving, fare dodging, or skiving off work by expressing disapproval or social exclusion. Our data suggest that people condition their sanctioning behavior on their belief about the...

The measurement of social norms plays a pivotal role in many social sciences. While economists predominantly conduct experiments, sociologists rather employ (factorial) surveys. Both methods, however, suffer from distinct weaknesses. Experiments, on the one hand, often fall short in the...