Jeffrey S. DeSimone

Illegal Drug Use and Employment

This article investigates the relationship between employment and the use of marijuana and cocaine for males in National Longitudinal Survey of Youth data from 1984 and 1988. Previous studies yielding mixed evidence may have inadequately accounted for the simultaneity between drug consumption and employment. I implement an instrumental variable procedure that identifies drug use with variables that are empirically unrelated to employment, including the regional cocaine price and a state marijuana decriminalization indicator. Results indicate that the use of each drug substantially reduces the likelihood of employment. Exogeneity tests reveal that standard probit estimates are severely biased toward zero.

Drinking and Academic Performance in High School

I investigate the extent to which negative alcohol use coefficients in Grade Point Average regressions reflect unobserved heterogeneity rather than direct effects of drinking, using 2001 and 2003 Youth Risk Behaviour Survey data on high school students. Results illustrate that omitted factors are quite important. Drinking coefficient magnitudes fall substantially in regressions that control for risk and time preference, mental health, self-esteem and consumption of other addictive substances. Moreover, the impact of binge drinking is negligible for students who are less risk averse, heavily discount the future or use other drugs. However, effects that remain significant after accounting for unobserved heterogeneity and are relatively large for risk averse, future-oriented and drug-free students suggest that binge drinking might slightly worsen academic performance. Consistent with this, the relationship between grades and drinking without binging is small and insignificant on the extensive margin and positive on the intensive margin.

Child Access Prevention Laws and Nonfatal Gun Injuries

Many states have passed child access prevention (CAP) laws, which hold the gun owner responsible if a child gains access to a gun that is not securely stored. Previous research on CAP laws has focused exclusively on gun-related deaths even though most gun injuries are not fatal. We use annual hospital discharge data to investigate whether CAP laws are associated with decreased nonfatal gun injuries. Results from Poisson regressions that control for various hospital, county, and state characteristics, including state-specific fixed effects and time trends, indicate that CAP laws are associated with reductions in nonfatal gun injuries among children under age 18. Our results are bolstered by the absence of effects on other outcomes such as self-inflicted gun injuries among adults and nongun self-inflicted injuries.