Extensive literature demonstrates that there is a link between being a woman and being more averse to corruption and women’s inclusion in political office and lower levels of corruption. There are two major ways of explaining this correlation; one emphasizes differences between men and women in risk-aversion and the other differences in pro-social behavior. However, whether there is support for these explanations is never directly tested. We take advantage of one opportunity for gathering this evidence by replicating and extending a well-cited experimental study by Alatas et al. (2009). Through our extension of the Alatas et al. study, we collected unique information on gender differences in rationalizations of experimental subjects’ behavior. The key finding is that we see significant gender differences in reasons for behavior: the results indicate risk-seeking behavior among men but not risk aversion among women. Instead, pro-social reasoning is apparent among women.