%0 Report %A Gächter, Simon %A Starmer, Chris %A Tufano, Fabio %T Revealing the Economic Consequences of Group Cohesion %D 2017 %8 2017 Jun %I Institute of Labor Economics (IZA) %C Bonn %7 IZA Discussion Paper %N 10824 %U https://www.iza.org/publications/dp10824 %X We introduce the concept of "group cohesion" to capture the economic consequences of ubiquitous social relationships in group production. We measure group cohesion, adapting the "oneness scale" from psychology. A comprehensive program of new experiments reveals the considerable economic impact of cohesion: higher cohesion groups are significantly more likely to achieve Pareto-superior outcomes in classic weak-link coordination games. We show that effects of cohesion are economically large, robust, and portable. We identify social preferences as a primary mechanism explaining the effects of cohesion. Our results provide proof of concept for group cohesion as a productive new tool of economic research. %K weak-link game %K coordination %K oneness %K group cohesion %K social relationships %K experiments %K real groups