This paper provides an analysis of who takes Advanced Placement (AP) Economics. We find large differences in enrollment in AP Economics across groups. Specifically, African-American and Hispanic students and students from low-income backgrounds are about half as likely to be enrolled in AP Economics as other students. However, once we control for prior academic achievement in Geometry, African-American and Hispanic students are overrepresented relative to whites and the difference between low-income and other students is reduced significantly. Female students are overrepresented relative to males, and Asian students are overrepresented relative to whites — this latter effect is large.