Job Market Paper
Place-based public-safety interventions are typically evaluated by whether they reduce crime, while their broader effects on residents, including children, remain understudied. We study this question using a randomized crime-deterrence experiment that installed 600,000-lumen light towers in public housing developments. The intervention reduced neighborhood crime (Chalfin et al., 2022; Mitre-Becerril et al., 2022) but may also have imposed costs on students through light intruding into their homes. To assess these competing effects, we construct a novel dataset linking the experiment to administrative records of public school students, incident-level crime and arrest data, and detailed building and development characteristics. We leverage randomized variation in lighting assignment and dosage together with building height, a proxy for students’ average vertical proximity to the street-level light towers. While there are no average effects of treatment assignment on either crime exposure or academic outcomes, students experience large reductions in crime exposure at higher lighting dosage that are not accompanied by average academic gains. These null average academic effects mask substantial heterogeneity by building height: within higher-dose developments, students in taller buildings gain in achievement and attendance, while students in shorter buildings lose 0.22 standard deviations in math, roughly twice the magnitude of the gains among students in taller buildings. The math loss and height contrast are not explained by differential crime reductions or schooling and are absent among students living just outside the developments. Consistent with sleep disruption, effects emerge earlier for girls than for boys, are accompanied by large increases in overweight risk among girls, and are modestly larger on noisier streets. These findings suggest that building height shaped whether students benefited from reductions in crime exposure or instead experienced costs from residential light intrusion.
Hold Harmless for Whom? The Impact of COVID Era Policies on School Funding, Teachers, and Students
(R&R at Education Finance and Policy)+ Abstract
This study evaluates the fiscal and academic consequences of New York City's hold harmless policy during COVID-19, which aimed to stabilize school expenditures amid unexpected enrollment declines by restoring schools' funding up to initial levels. We examine how school racial composition predicts whether or when schools receive hold harmless "treatment" and assess the impact of hold harmless on financial resources, staffing, and student outcomes, exploring heterogeneity by timing of policy announcement. Although schools with higher White student shares were no more likely than those with higher Hispanic or Black shares to receive hold harmless funds, schools with higher Black shares that did receive them saw larger per-pupil allocations due to deeper enrollment losses. Overall, hold harmless schools experienced significant increases in per-pupil spending, and reduced pupil-teacher ratio and class size, while maintaining the size of the teaching workforce. We find hold harmless had no effect on attendance or chronic absenteeism in 2021 or 2022, but improved both in 2023, when it was announced earlier. Although funds often rolled over to later years, we find no corresponding gains in student outcomes. Overall, the policy effectively preserved school-level spending and staffing – as intended – with some improvements in student outcomes when announced early.
How a Good School in the Neighborhood Affects Academic Outcomes (with Sarah Cordes, Jeehee Han, and Amy Ellen Schwartz)
+ Abstract
Despite broad consensus that good schools matter, evidence on the causal effect of proximity to good schools on student performance is limited. This paper explores the causal impacts of living near a good school, leveraging plausibly random variation in proximity to good schools among public housing children. We find that living closer to a good school increases reading and math scores, improves attendance, and reduces chronic absenteeism. The probabilities of attending the nearest good school and any good school increase with proximity, suggesting both direct and indirect effects. As a policy lever, pupil transportation appears to ameliorate the negative effects of distance.
Works in Progress
The Impact of a Crime Deterrence Intervention on Political Behavior (with Ying Shi)
+ Abstract
Place-based crime prevention policies are typically evaluated based on their effects on crime. Yet these interventions may also shape the behavior of residents in targeted areas in ways that are less well understood. This paper asks whether a crime-reduction intervention that increases visible police presence affects residents’ political behavior and residential mobility. We study a randomized experiment conducted in New York City public housing developments, in which high-intensity police streetlights were installed to deter crime. These lights dramatically increased nighttime illumination and introduced visible police infrastructure into residential environments. The intervention may have affected residents through multiple channels. First, a safety channel: prior work shows that the lights significantly reduced nighttime outdoor crime. Second, an intrusion channel: the lights generated substantial brightness (approximately 600,000 lumens) and noise from generators, which residents reported as disruptive. Third, a signaling channel: the lights served as highly visible markers of police presence, potentially altering perceptions of surveillance and state control. These mechanisms generate distinct empirical predictions. If responses are driven by safety improvements or physical intrusion, effects should scale with treatment intensity and be strongest among residents closest to the lights. If instead the lights operate primarily as a signal of policing, effects should appear at the extensive margin of treatment and not vary systematically with dosage or proximity. We link voter registration and turnout records, police data, and public housing administrative files with precise residential addresses to construct a panel of residents in treated and control developments over the study period (2012-2024). Exploiting development-level random assignment of streetlights within matched pairs, we estimate intention-to-treat effects of exposure to any lights and examine heterogeneity by dosage and vertical proximity to light towers, which we proxy with the residential floor in which voters live: those living in lower floors are more exposed to the brightness of the lights than those in higher floors. We find no meaningful effects on residential mobility or attrition from public housing. However, the intervention led to significant changes in political behavior: treated residents were less likely to register as Democrats and more likely to register as Republican or non-partisan, and were less likely to vote across election types. These effects do not scale with treatment intensity and do not vary by residential proximity to the lights, consistent with a signaling mechanism rather than physical nuisance. These findings suggest that visible policing infrastructure can reshape political engagement even when it reduces crime, highlighting the importance of evaluating place-based interventions beyond their intended outcomes.
The Long-Term Impact of Neighborhood Violence on Youth Outcomes (with Amy Ellen Schwartz)
Housing Market Responses to Salient Police Interventions: Experimental Evidence from High- Intensity Streetlights (with Alexander Cardazzi)