Working Papers   

Evidence on the Efficacy of School-Based Incentives for Healthy Living

Joint with Harold Cuffe, William T. Harbaugh, Giancarlo Musto, and Glen R. Waddell

Conditionally accepted at Economics of Education Review. Previously circulated as NBER Working Paper No. 17478.

We analyze the effects of a school-based incentive program on children's exercise habits. The program offers children an opportunity to win prizes if they walk or bike to school during prize periods. We use daily child-level data and individual fixed effects models to measure the impact of the prizes by comparing behavior during prize periods with behavior during non-prize periods. Variation in the timing of prize periods across different schools allows us to estimate models with calendar-date fixed effects to control for day-specific attributes, such as weather and proximity to holidays. On average, we find that being in a prize period increases riding behavior by sixteen percent, a large impact given that the prize value is just six cents per participating student. We also find that winning a prize lottery has a positive impact on ridership over subsequent weeks; consider heterogeneity across prize type, gender, age, and calendar month; and explore differential effects on the intensive versus extensive margins.

Alcohol and Student Performance: Estimating the Effect of Legal Access

Joint with Isaac D. Swensen and Glen R. Waddell

Revision requested at Journal of Health Economics. NBER Working Paper No. 17637. Previously circulated as IZA Discussion Paper No. 5552.

We consider the effect of legal access to alcohol on student achievement. Our preferred approach identifies the effect through changes in one's performance after gaining legal access to alcohol, controlling flexibly for the expected evolution of grades one makes progress towards their degree. We also report RD estimates but argue that RD is not well suited to the research question in our setting. We find that students' grades fall below their expected levels upon being able to drink legally, but by less than previously documented. We also show that there are effects on women and that the effects are persistent.

Heaping-Induced Bias in Regression-Discontinuity Designs

Joint with Alan I. Barreca and Glen R. Waddell

August 2011. NBER Working Paper No. 17408.

This study uses Monte Carlo simulations to demonstrate that regression-discontinuity designs arrive at biased estimates when attributes related to outcomes predict heaping in the running variable. After showing that our usual diagnostics are poorly suited to identifying this type of problem, we provide alternatives. We also demonstrate how the magnitude and direction of the bias varies with bandwidth choice and the location of the data heaps relative to the treatment threshold. Finally, we discuss approaches to correcting for this type of problem before considering these issues in several non-simulated environments.

Drawn Into Violence: Evidence on 'What Makes a Criminal' from the Vietnam Draft Lotteries

Joint with Charles Stoecker

February 2012. NBER Working Paper No. 17818. Previously circulated as IZA Discussion Paper No. 5172.

Draft lottery number assignment during the Vietnam Era provides a natural experiment to examine the effects of military service on crime. Using exact dates of birth for inmates in state and federal prisons in 1979, 1986, and 1991, we find that draft eligibility increases incarceration for violent crimes but decreases incarceration for non-violent crimes among whites. This is particularly evident in 1979, where two-sample instrumental variable estimates indicate that military service increases the probability of incarceration for a violent crime by 0.34 percentage points and decreases the probability of incarceration for a nonviolent crime by 0.30 percentage points. We conduct two falsification tests, one that applies each of the three binding lotteries to unaffected cohorts and another that considers the effects of lotteries that were not used to draft servicemen.

Publications

Are Big-Time Sports a Threat to Student Achievement?

Joint with Isaac D. Swensen and Glen R. Waddell

Forthcoming at American Economic Journal: Applied Economics

We consider the relationship between collegiate-football success and non-athlete student performance. We find that the team's success significantly reduces male grades relative to female grades. This phenomenon is only present in fall quarters, which coincides with the football season. Using survey data, we find that males are more likely than females to increase alcohol consumption, decrease studying, and increase partying in response to the success of the team. Yet, females also report that their behavior is affected by athletic success, suggesting that their performance is likely impaired but that this effect is masked by the practice of grade curving.

Saving Babies? Revisiting the Effect of Very Low Birth Weight Classification

Joint with Alan Barreca, Melanie Guldi, and Glen R. Waddell

The Quarterly Journal of Economics, 126(4), 2011.

We reconsider the effect of very low birth weight classification on infant mortality. We demonstrate that the estimates are highly sensitive to the exclusion of observations in the immediate vicinity of the 1500-gram threshold, weakening the confidence in the results originally reported in Almond, Doyle, Kowalski, and Williams (2010).

Parental Job Loss and Infant Health

Journal of Health Economics, 30(5), 2011. [Pre-publication version]

This paper is the first to explore the extent to which the health effects of job displacement extend to the children of displaced workers. Using detailed work and fertility histories from the Panel Study of Income Dynamics, estimates are identified by comparing the outcomes of children born after a displacement to the outcomes of those born before. This analysis reveals that husbands' job losses have significant negative effects on infant health. They reduce birth weights by approximately four and a half percent with suggestive evidence that the effect is concentrated on the lower half of the birth weight distribution.

Ability, Gender, and Performance Standards: Evidence from Academic Probation

Joint with Nicholas J. Sanders and Philip Oreopoulos

American Economic Journal: Applied Economics, 2(2), 2010.

We use a regression discontinuity design to examine students' responses to being placed on academic probation. Consistent with a model of introducing performance standards, we find that being placed on probation at the end of the first year discourages some students from returning to school while improving the GPAs of those who return. We find heterogeneous responses across prior academic performance, gender, and native language, and discuss these results within the context of the model. We also find negative effects on graduation rates, particularly for students with the highest high school grades.

Are Children Really Inferior Goods? Evidence from Displacement-driven Income Shocks

The Journal of Human Resources, 45(2), 2010.

Although many papers have attempted to reconcile economic theory with the commonly observed negative relationship between income and fertility, little is known about the causal nature of the relationship. This paper explores the causal link by analyzing women’s fertility response to the large and permanent income shock generated by a husband’s job displacement. I find that the shock reduces total fertility, suggesting that the causal effect of income on fertility is positive. A model that incorporates the time cost of children and assortative matching of spouses can simultaneously explain this result and the negative cross-sectional relationship. I also find that the income shock accelerates childbearing. This finding is consistent with life-cycle models of fertility in which a husband’s earnings growth provides an incentive to delay having children.

Parental Income Shocks and Outcomes of Disadvantaged Youth in the United States

Joint with Marianne E. Page and Ann Huff Stevens

In Jonathan Gruber, ed., An Economic Perspective on the Problems of Disadvantaged Youth. Chicago: University of Chicago Press, 2009.

This paper uses layoffs and business closings to identify the effect of a permanent parental income shock on children’s long-run socioeconomic outcomes. We find that estimates of the intergenerational effects of parental job loss are sensitive to our definition of job displacement. Focusing on measures of displacement that are most likely to be exogenous, we find no evidence of intergenerational effects of job loss on the average child. In contrast, among disadvantaged children (defined by family income or race), we find evidence of negative effects of parental displacement on income, earnings, and completed education.

Work in Progress   

Aggregation and the Relationship Between Unemployment and Health

Local Economic Conditions and Health: Evidence from Large Firm Openings and Closings

Joint with Scott Hankins and Ann Huff Stevens

Small Fish in a Big Pond: Peer Age Composition and Adolescent Risky Behavior

Joint with Benjamin Hansen and Glen R. Waddell

Tragedies, School Counselors, and Student Achievement

Joint with Benjamin Hansen and Kristian Holden

Local Economic Conditions and Child Maltreatment

Joint with Jessamyn Schaller