We conduct a comprehensive examination of the causal effect of charter schools on school segregation, using a triple differences design that utilizes between-grade differences in charter expansion within school systems, and an instrumental variable approach that leverages charter school opening event variation. Charter schools increase school segregation for Black, Hispanic, White, and Asian students. The effect is of modest magnitude; segregation would fall 6 percent were charter schools eliminated from the average district. Analysis across varied geographies reveals countervailing forces. In metropolitan areas, charters improve integration between districts, especially in areas with intense school district fragmentation.
The Milwaukee Parental Choice Program (MPCP), the first modern private school choice program in the United States, has grown from 341 students attending 7 private schools in 1990 to 27,857 students attending 126 private schools in 2019. The MPCP has been subject to extensive study focused largely on student performance on standardized tests. This study presents new data on the college enrollment, persistence, and graduation of MPCP and MPS students who were tracked over 12 years beginning in 2006. MPCP participants are compared with a matched sample of MPS students who lived in the same neighborhood and had similar demographic characteristics and test scores at the beginning of the study. The collective evidence in this paper indicates that students in the MPCP program have greater educational attainment than the comparison group, as measured by college experience and outcomes. Most of the college attainment benefits of the MPCP are clear for both students who were in ninth grade at the beginning of the study, for whom positive attainment effects have previously been reported, and students who were initially enrolled in grades three through eight, who we examine here for the first time. As of 2018, MPCP students have spent more total years in a four-year college than their MPS peers. The MPCP students in the grade three through eight sample attained college degrees at rates that are statistically significantly higher than their matched MPS peers.