title: Does Group Size Matter for Behavior in Online Trust Dilemmas?
abstract: How does group size influence behavior in online trust dilemmas? We investigate cooperation in groups of 4 to 100 players. While overall levels of cooperation are stable across group sizes, we find significant gender differences: women increase cooperation with group size and cooperate significantly more than men in large groups. These results are robust when controlling for risk aversion, age, and other individual differences. They highlight the importance of studying behavior and gender differences in large groups.
authors.affiliation: Center for Adaptive Behavior and Cognition, Max Planck Institute for Human Development, Berlin, Germany.|Saïd Business School, University of Oxford, Oxford, United Kingdom.
authors.forename: Sabrina
authors.initials: S
authors.lastname: Artinger
authors.affiliation: Saïd Business School, University of Oxford, Oxford, United Kingdom.
authors.forename: Nir
authors.initials: N
authors.lastname: Vulkan
mesh_terms: D000328:Adult; D000367:Age Factors; D003299:Cooperative Behavior; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012309:Risk-Taking; D012919:Social Behavior; D035502:Trust; D055815:Young Adult