We study the returns to experience in teaching, estimated using supervisor ratings from classroom observations. We describe the assumptions required to interpret changes in observation ratings over time as the causal effect of experience on performance. We compare two difference-in-differences...

We examine the effect of a representative pension reform on the retention and productivity of workers. The reform cut pension annuities and early retirement benefits for public school teachers, projected to save eight percent of pension revenues. We leverage administrative records and a...

The gap between the qualifications of New York City teachers in high-poverty schools and low-poverty schools has narrowed substantially since 2000. Most of this gap-narrowing resulted from changes in the characteristics of newly hired teachers, and largely has been driven by the virtual...