This study utilizes a natural experiment that arises due to the variation in the adoption of coeducation by U.S. women’s colleges to study how exposure to a mixed-gender collegiate environment affects women’s human capital investments. They collect data on the date of transition to coeducation for all former women's colleges in the United States and combined this data with data from IPEDS, its predecessor HERI, as well as data from the Higher Education Research Institue at UCLA to conduct their analyses. The goal of the project is to better isolate the effects of preferences and subjective beliefs as determinants of college major choice.