This study utilizes a grant in California that required a group of high schools to increase the number of Advanced Placement(AP) courses offered to their students. The grant provides an arguably exogenous increase in the number of AP coursesoffered in a school. Using an instrumental variable approach, this analysis shows that offering an additional AP course doesnot increase total enrollment in AP courses. Instead, students substitute out of other AP subjects to enroll in the new subject being offered. This result suggests that additional AP course access is unlikely to induce students to enroll in more APcourses.
Lang, Bree J., "Does Offering More Advanced Placement Courses Increase Enrollment?" (2011). Faculty Scholarship. Paper 59.