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Using a dataset of survey responses from University of Michigan Law School graduates from the classes of 1970 through 1996, I find that fathers tend to receive higher salaries than non-fathers (a "daddy bonus"). In addition, mothers earn less than non-mothers (a "mommy penalty"). There is also some statistical support for the inference that there is a penalty associated purely with gender (women earning less than men, independent of parenthood), another result that is unique to the literature.

My tentative results confirm the "daddy bonus" that others' have found in other studies, with the range of estimates suggesting a 15-20% salary advantage for fathers. Unlike previous studies, however, I also find a strong suggestion that women with children endure a "mommy penalty," earning perhaps 10-15% less than the childless (and thus 25-35% less than fathers). I also find some weaker statistical support for the hypothesis that childless women earn less than childless men, with my estimates suggesting an 8-9% difference disfavoring women.