%0 Report %A Bauer, Michal %A Cahlíková, Jana %A Katreniak, Dagmara Celik %A Chytilová, Julie %A Cingl, Lubomir %A Želinský, Tomáš %T Anti-Social Behavior in Groups %D 2018 %8 2018 Nov %I Institute of Labor Economics (IZA) %C Bonn %7 IZA Discussion Paper %N 11944 %U https://www.iza.org/publications/dp11944 %X This paper provides strong evidence supporting the long-standing speculation that decision-making in groups has a dark side, by magnifying the prevalence of anti-social behavior towards outsiders. A large-scale experiment implemented in Slovakia and Uganda (N=2,309) reveals that deciding in a group with randomly assigned peers increases the prevalence of anti-social behavior that reduces everyone's payoff but which improves the relative position of own group. The effects are driven by the influence of a group context on individual behavior, rather than by group deliberation. The observed patterns are strikingly similar on both continents. %K aggressive competitiveness %K antisocial behavior %K group decision-making %K group membership %K group conflict