Cooperation is important but difficult to achieve in social dilemmas. It is even more challenging to promote cooperation among individuals from diverse backgrounds. In this paper, we design a lab experiment to investigate how group identity influences cooperation and peer punishment under the voluntary contribution mechanism of public goods. Artificial groups are created in the lab through rand...

This paper presents a novel experiment on group conflict. Subjects are divided into groups according to preferences on paintings, and subjects are divided into groups according to self-declared political affiliations and leanings. Using a unique within subject design, we find twenty percent of subjects destroy social welfare – at personal cost – when facing a subject outside their group. This e...

Background: Neuroticism is one of the serious mental health problems of people. No study has been conducted on the impact of identity issues in the treatment of neurotic people. Objectives: This study aims to formulate, design, and investigate the effect of identity-based psychodrama educational program on identity styles and neuroticism. Materials & Methods: This research was a quasi-experim...

We stress-test the limits of power group identity in context cooperation by constructing laboratory economies where participants confront an indefinitely repeated social dilemma as strangers. Group is artificially induced random assignment to color-coded groups, and reinforced initial task played in-group fixed pairs. Subsequently subjects interact out-group large economies, Indefinite repetiti...