RT Journal Article SR Electronic T1 Prenatal Testosterone and the Earnings of Men and Women JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 30 OP 61 DO 10.3368/jhr.51.1.30 VO 51 IS 1 A1 Gielen, Anne C. A1 Holmes, Jessica A1 Myers, Caitlin YR 2016 UL http://jhr.uwpress.org/content/51/1/30.abstract AB Testosterone, which induces sexual differentiation of the male fetus, is believed to transfer from males to their littermates in placental mammals. Among humans, individuals with a male twin have been found to exhibit greater masculinization of sexually dimorphic attributes relative to those with a female twin. We therefore regard twinning as a plausible natural experiment to test the link between prenatal exposure to testosterone and labor market earnings. For men, the results suggest positive returns to testosterone exposure. For women, however, the results indicate that prenatal testosterone does not generate higher earnings and may even be associated with modest declines.