How do proficiency-based accountability systems affect inequality in academic achievement? This article reconciles mixed findings in the literature by demonstrating that three factors jointly determine accountability's impact. First, by analyzing student-level data from a large urban school district, we find that when educators face accountability…

Over the past two decades, most states have adopted laws enabling charter schools, as charter advocates successfully presented charters as the solution to core problems in urban public education. Yet some states with large urban centers, notably Washington and Kentucky, resisted this seemingly inexorable trend for years. What explains their…