D. Mark Anderson

Medical Marijuana Laws, Traffic Fatalities, and Alcohol Consumption

To date, 19 states have passed medical marijuana laws, yet very little is known about their effects. The current study examines the relationship between the legalization of medical marijuana and traffic fatalities, the leading cause of death among Americans ages 5–34. The first full year after coming into effect, legalization is associated with an 8–11 percent decrease in traffic fatalities. The impact of legalization on traffic fatalities involving alcohol is larger and estimated with more precision than its impact on traffic fatalities that do not involve alcohol. Legalization is also associated with sharp decreases in the price of marijuana and alcohol consumption, which suggests that marijuana and alcohol are substitutes. Because alternative mechanisms cannot be ruled out, the negative relationship between legalization and alcohol-related traffic fatalities does not necessarily imply that driving under the influence of marijuana is safer than driving under the influence of alcohol.

Does Information Matter? The Effect of the Meth Project on Meth Use Among Youths

Are demand-side interventions effective at curbing drug use? To the extent demand-side programs are successful, their cost effectiveness can be appealing from a policy perspective. Established in 2005, the Montana Meth Project (MMP) employs a graphic advertising campaign to deter meth use among teens. Due to the MMPs apparent success, seven other states have adopted Meth Project campaigns. Using data from the Youth Risk Behavior Surveys (YRBS), this paper investigates whether the MMP reduced methamphetamine use among Montanas youth. When accounting for a preexisting downward trend in meth use, effects on meth use are statistically indistinguishable from zero. These results are robust to using related changes of meth use among individuals without exposure to the campaign as controls in a difference-in-difference framework. A complementary analysis of treatment admissions data from the Treatment Episode Data Set (TEDS) confirms the MMP has had no discernable impact on meth use.

Medical marijuana laws and suicides by gender and age.

OBJECTIVES We estimated the association between legalizing medical marijuana and suicides. METHODS We obtained state-level suicide data from the National Vital Statistics Systems Mortality Detail Files for 1990-2007. We used regression analysis to examine the association between medical marijuana legalization and suicides per 100 000 population. RESULTS After adjustment for economic conditions, state policies, and state-specific linear time trends, the association between legalizing medical marijuana and suicides was not statistically significant at the .05 level. However, legalization was associated with a 10.8% (95% confidence interval [CI] = -17.1%, -3.7%) and 9.4% (95% CI = -16.1%, -2.4%) reduction in the suicide rate of men aged 20 through 29 years and 30 through 39 years, respectively. Estimates for females were less precise and sensitive to model specification. CONCLUSIONS Suicides among men aged 20 through 39 years fell after medical marijuana legalization compared with those in states that did not legalize. The negative relationship between legalization and suicides among young men is consistent with the hypothesis that marijuana can be used to cope with stressful life events. However, this relationship may be explained by alcohol consumption. The mechanism through which legalizing medical marijuana reduces suicides among young men remains a topic for future study.

Does Shortening the School Week Impact Student Performance? Evidence from the Four-Day School Week

Public schools face difficult decisions on how to pare budgets. In the current financial environment, school districts employ a variety of policies to close budget gaps and stave off teacher layoffs and furloughs. An increasing number of schools are implementing four-day school weeks hoping to reduce overhead and transportation costs. The four-day-week policy requires substantial schedule changes as schools must increase the length of their school day to meet state-mandated minimum instructional hour requirements. Although some schools have indicated that this policy eases financial pressures, it is unknown whether the restructured schedule has an impact on student outcomes. In this study, we use school-level longitudinal data from the state of Colorado to investigate the relationship between the four-day school week and academic performance among elementary school students. We exploit the temporal and spatial variation in the four-day school week using a difference-in-differences empirical strategy. Our results suggest that student academic achievement has not been hurt by the change in schedule. Instead, the evidence indicates that the adoption a four-day school week shares a positive and often statistically significant relationship with performance in both reading and mathematics; the math results in particular are generally robust to a range of specification checks. These findings have policy relevance to the current U.S. education system, where many school districts must cut costs. The four-day school week is a strategy currently under debate.

Wet Laws, Drinking Establishments, and Violent Crime

Drawing on county-level data from Kansas for the period 1977-2011, we examine whether plausibly exogenous increases in the number of establishments licensed to sell alcohol by the drink are related to violent crime. During this period, 86 out of 105 counties in Kansas voted to legalize the sale of alcohol to the general public for on-premises consumption. We provide evidence that these counties experienced substantial increases in the total number of establishments with on-premises liquor licenses (e.g., bars and restaurants). Using legalization as an instrument, we show that a 10 percent increase in drinking establishments is associated with a 4 percent increase in violent crime. Reduced-form estimates suggest that legalizing the sale of alcohol to the general public for on-premises consumption is associated with an 11 percent increase in violent crime.

The minimum dropout age and student victimization

Over the years, the minimum dropout age has been raised to 18 in 21 states. Although these policy changes are promoted for their educational benefits, they have been shown to reduce crimes committed by youths in the affected age groups. However, an unintended consequence of increasing the minimum dropout age could be the displacement of crime from the streets to schools. We use data from the Youth Risk Behavior Surveys to estimate the relationship between minimum dropout age laws and student victimization. Our results suggest that higher minimum dropout ages increase the likelihood that females and younger students report missing school for fear of their safety and younger students are more likely to report being threatened or injured with a weapon on school property. Our results also yield some evidence that students are more likely to report being victims of in-school theft when the minimum dropout age is higher.

THE IMPACT OF HIV EDUCATION ON BEHAVIOR AMONG YOUTHS: A PROPENSITY SCORE MATCHING APPROACH

There has been a long‐standing debate as to whether sex or human immunodeficiency virus (HIV) education actually influences the way young people behave. To the extent these programs work, they represent a potential mechanism policy‐makers might use to reduce risky behavior among youths. This paper uses data from the 2009 Youth Risk Behavior Survey to examine if students who have received school‐based HIV instruction behave differently than those who have not. To address potentially endogenous exposure to HIV education, this paper considers a propensity score matching approach. Findings from the propensity score analysis suggest that standard ordinary least squares results are biased. Despite this, there remains some evidence that exposure to HIV education decreases risky sexual activity. Among male students, HIV education is also negatively related to the rate of using needles to inject illegal drugs into the body. The needle use results are robust to a sensitivity analysis, while the results for sexual behaviors are not.

The meth project and teen meth use: new estimates from the national and state youth risk behavior surveys

In this note, we use data from the national and state Youth Risk Behavior Surveys for the period 1999 through 2011 to estimate the relationship between the Meth Project, an anti-methamphetamine advertising campaign, and meth use among high school students. During this period, a total of eight states adopted anti-meth advertising campaigns. After accounting for pre-existing downward trends in meth use, we find little evidence that the campaign curbed meth use in the full sample. We do find, however, some evidence that the Meth Project may have decreased meth use among White high school students.

Deployments, Combat Exposure, and Crime

During the period 2001–9, four combat brigades and the Third Armored Cavalry Regiment were based at Fort Carson, Colorado. These units were repeatedly deployed during the Iraq War, which allows us to measure the effect of arguably exogenous changes in troop levels on violent crime in El Paso County, where Fort Carson is located. We find that never-deployed units contributed to community violence in the form of assaults, murders, rapes, and robberies. In contrast, estimates of the relationship between previously deployed units and violent crime are generally small and statistically insignificant at conventional levels. We interpret this pattern of results as evidence that never-deployed units represent a greater threat to public safety than units recently returned from combat.

The Effects of Poverty on the Susceptibility to Crime in South Africa

Crime is a major economic and social problem in most developing countries. However, the research devoted to victims is sparse. This paper examines the effects of household-level poverty, measured by household expenditures per capita, on the susceptibility to crime in South Africa. An instrumental variables strategy combined with community fixed effects are used to account for potentially endogenous expenditures and unobserved community heterogeneity, respectively. Across all model specifications the probability a South African household is robbed is increasing in expenditures. When using instrumental variables, the positive effect of expenditures on the susceptibility to robbery increases substantially. In addition, the effect of expenditures remains positive and significant if the sample is restricted to “nonwhite” areas. This suggests that robberies are not only a problem for the rich who live in gated communities and hire private security, but also for the relatively “wealthy” that reside in poorer neighborhoods. Finally, this paper fails to find a statistically significant relationship between expenditures and the susceptibility to violent crimes such as murder, rape, and assault.