In this paper, we develop a new asymptotic theory of the long run variance estimator obtained by fitting a vector autoregressive model to the transformed moment processes in a GMM framework. In contrast to the conventional asymptotics where the VAR lag order p goes to infinity but at a slower...

This study uses administrative data linking students and teachers at the classroom level to estimate teacher value-added to student test scores. We find that variation in teacher quality is an important contributor to student achievement more important than has been implied by previous work....

Value-added measures of teacher quality may be sensitive to the quantitative properties of the testing instruments upon which they are based. This paper focuses on the sensitivity of value-added to a particularly relevant testing-instrument property test-score-ceiling effects. Test-score...

Our study examines the dynamic structure of welfare participation and the labor market involvement of recipients starting in the early 1990s and extending through 1999 in the core counties containing six major urban areas: Atlanta, Baltimore, Chicago, Fort Lauderdale, Houston, and Kansas City....

Our study examines the dynamic structure of welfare participation and the labor market involvement of recipients starting in the early 1990s and extending through 1999 in the core counties containing six major urban areas: Atlanta, Baltimore, Chicago, Fort Lauderdale, Houston, and Kansas City....