This paper tests social identity theory with respect to individuals' self-identification behavior. We report results … from a laboratory experiment in which subjects choose their group membership, which is interpreted as decision to identify … with the predictions from social identity theory: Subjects have a higher valuation for identifying with groups with a …

high-frequency decision making. For such teams our model predicts an inverted U-shape relation between effort and team …The paper analyzes the effect of team-size on effort in start-up teams. We extend the model of Kandel and Lazear (1992 …) to study the joint effect of free-riding and peer pressure, which both dependent on team size in our model. The special …

conjunction with moral foundations theory. In one treatment, the subject and social group's moral values were similar, and in …