"Data and Code for: The Effect of Charter Schools on School Segregation"

We examine the impact of the charter school movement on racial segregation in public schools, defined using varying measures of racial sorting and isolation. We identify impacts using between-grade differences in charter expansion within school systems, and an instrumental variables approach leveraging event variation from school openings. Charter schools modestly increase school segregation for Black, Hispanic, Asian, and White students. Charters on average have driven a 6\% increase in sorting of Black and Hispanic students in public schools. Analysis across varied geographies reveals countervailing forces. In metropolitan areas, charters reduce demographic differences between districts, especially in areas fragmented into many jurisdictions.