Economic research on gender gaps in preferences and economic outcomes has focused on variation with respect to sex-a binary classification as either a "man" or "woman." We validate a novel and simple measure of self-reported continuous gender identity (CGI) and explore whether gender identity...

We study the stability of voluntary cooperation in response to varying group growth rates. Using a laboratory public-good game, we construct a situation where increasing group size yields potential efficiency gains, but only with sustained cooperation. We then study the effect of exogenously...

We study the stability of voluntary cooperation in response to varying rates at which a group grows. Using a laboratory public-good game with voluntary contributions and economies of scale, we construct a situation in which expanding a group's size yields potential efficiency gains, but only if...