Gender and generosity: Does degree of anonymity or group gender composition matter?

Employing a two-by-two factorial design that manipulates whether dictator groups are single or mixed-sex and whether procedures are single or double-blind, we examine gender effects in a standard dictator game. No gender effects were found in any of the experimental treatments for the mean or median levels of giving, or for the propensity to give nothing. However, females chose to give away half of their endowments with greater frequency than males in the pooled single-sex treatments.