In the late 1930s, the NAACP launched a campaign to equalize Black and white teacher salaries in the de jure segregated schools of the American South. Using newly collected county panel data spanning three decades, this paper first documents heterogeneous within-state impacts of the campaign on...

We study the determinants of math achievement among children in early elementary school using data from a unique experiment in which children were randomly assigned to classrooms within schools for four consecutive grades. As a result, each child in our sample was exposed to four separate,...