NBER Working Papers by Scott A. Imberman

In response to low take-up, many public schools have experimented with moving breakfast from the cafeteria to the classroom. We examine whether such a program increases performance as measured by standardized test scores, grades and attendance rates. We exploit quasi-random timing of program implementation that allows for a difference-in-differences identification strategy. Our main identification assumption is that schools where the program was introduced earlier would have evolved similarly to those where the program was introduced later. We find that in-class breakfast increases both math and reading achievement by about one-tenth of a standard deviation relative to providing breakfast in the cafeteria. Moreover, we find that these effects are most pronounced for low performing, free-lu...

Uniform use in public schools is rising, but we know little about how they affect students. Using a unique dataset from a large urban school district in the southwest United States, we assess how uniforms affect behavior, achievement and other outcomes. Each school in the district determines adoption independently, providing variation over schools and time. By including student and school fixed-effects we find evidence that uniform adoption improves attendance in secondary grades, while in elementary schools they generate large increases in teacher retention.

In this paper we determine how the receipt of gifted and talented (GT) services affects student outcomes. We identify the causal relationship by exploiting a discontinuity in eligibility requirements and find that for students on the margin there is no discernable impact on achievement even though peers improve substantially. We then use randomized lotteries to examine the impact of attending a GT magnet program relative to GT programs in other schools and find that, despite being exposed to higher quality teachers and peers that are one standard deviation higher achieving, only science achievement improves. We argue that these results are consistent with an invidious comparison model of peer effects offsetting other benefits. Evidence of large reductions in course grades and rank relative...

In 2005, hurricanes Katrina and Rita forced many children to relocate across the Southeast. While schools quickly enrolled evacuees, receiving families worried about the impact of evacuees on non-evacuee students. Data from Houston and Louisiana show that, on average, the influx of evacuees moderately reduced elementary math test scores in Houston. We reject linear-in-means models of peer effects and find evidence of a highly non-linear but monotonic model - student achievement improves with high ability and worsens with low ability peers. Moreover, exposure to undisciplined evacuees increased native absenteeism and disciplinary problems, supporting a "bad apple" model in behavior.