We propose and validate a task to induce acute socio-evaluative stress in the laboratory. The task features performance-based pay and simultaneously creates a treatment and a control group. Employing this task, we study the influence of acute socio-evaluative stress on the propensity to tell a...

This paper introduces two ideas, emotional state dependent utility components (ESDUCs), and evolutionary perfect Bayesian equilibrium (EPBE). Using a simple extensive form game, we illustrate the efficiency-enhancing role of a powerful ESDUC, the vengeance motive. Incorporating behavioral noise...

In three sets of experiments involving 5,432 subjects, we show that agents make more errors when doing so allows them to justify selfish behavior. We show that errors relating to addition arise when they can help to justify selfishness but are eliminated when selfish motives are removed. In...