Large and rapid upswings in illicit drug use display similar properties to infectious disease epidemics. In this chapter, we review research to understand what causes drug epidemics and how they end. Drug market actors are subject to both positive and negative reinforcement that lead to rapid,...

Organized intergroup violence is almost universally modeled as a calculated act motivated by economic factors. In contrast, it is generally assumed that non-economic factors, such as an individual's emotional state, play a role in many types of interpersonal violence, such as "crimes of...

This study considers the effects of the kingpin strategy, an approach to fighting organized crime in which law-enforcement efforts focus on capturing the leaders of criminal organizations, on community violence in the context of Mexico's drug war. Newly constructed historical data on...

Whereas attitudes towards risk are thought to play an important role in many decisions over the life-course, factors that affect those attitudes are not fully understood. Using longitudinal survey data collected in Mexico before and during the Mexican war on drugs, we investigate how an...

Despite nearly 70 percent of the American public supporting legalization of recreational marijuana, opponents argue that increased marijuana use may diminish motivation, impede cognitive function, and harm health, each of which could adversely affect adults' economic wellbeing. This study is the...

The U.S. opioid crisis is now driven by fentanyl, a powerful synthetic opioid that currently accounts for 90% of all opioid deaths. Fentanyl is smuggled from abroad, with little evidence on how this happens. We show that a substantial amount of fentanyl smuggling occurs via legal trade flows,...

The number of prisoners incarcerated on drug-related offenses rose fifteen-fold between 1980 and 2000. This paper provides the first systematic empirical analysis of the implications of that dramatic shift in public policy. We show that the increase in drug prisoners led to reductions in...

College campuses have been cracking down on underage and binge drinking in light of recent highly publicized student deaths. Although there is evidence showing that stricter college alcohol policies have been effective at discouraging both drinking in general and frequent binge drinking on...

The purpose of this paper is to examine the direct relationship between the prices of alcohol and drugs and the incidence of criminal violence in a nationally representative sample of individuals in the United States. The positive association between substance use and violence is well...

This study uses data from the Children of the National Longitudinal Survey of Youth to test for evidence of a causal relationship between maternal alcohol use, marijuana use and cocaine use, and children's behavior problems. Ordinary least squares results provide strong evidence that maternal...