Schools often track students to classes based on ability. Proponents of tracking argue it is a low-cost tool to improve learning since instruction is more effective when students are more homogeneous, while opponents argue it exacerbates initial differences in opportunities without strong...

We explore the role that physicians play in moderating compliance with recommended vaccinations. Using administrative data on the universe of Danish children and their healthcare providers, we first construct and validate a measure of providers' propensities to comply with recommended...

Abstract It is widely known that standardized tests are noisy measures of student learning, but value added models (VAMs) rarely account for test measurement error (TME). We incorporate information about TME directly into VAMs, focusing on TME that derives from the testing instrument itself. Our...