Evolutionary explanations of anger as a commitment device hinge on two key assumptions. The first is that it is observable ex-ante whether someone will get angry when feeling badly treated. The second is that anger is associated with destructive behavior. We test the validity of these...

We investigate how different forms of scrutiny affect dishonesty, using Gneezy's (2005) deception game. We add a third player whose interests are aligned with those of the sender. We find that lying behavior is not sensitive to revealing the sender's identity to the observer. The option for...

Self-administered rewards are ubiquitous. They serve as incentives for personal accomplishments and are widely recommended to increase personal motivation. We show that in a model with time-inconsistent and reference-dependent preferences, self-rewards can be a credible and effective tool to...

We provide experimental evidence on the ability to detect deceit in a buyer-seller game with asymmetric information. Sellers have private information about the buyer's valuation of a good and sometimes have incentives to mislead buyers. We examine if buyers can spot deception in face-to-face...

We study the role of communication in a high stakes prisoner's dilemma, using data from a television game show. 40 Percent of the players voluntarily promise to cooperate, and these players are 50 percentage points more likely to cooperate than players who do not volunteer a promise. However,...