The view that empirical strategies in economics should be transparent and credible now goes almost without saying. The local average treatment effects (LATE) framework for causal inference helped make this so. The LATE theorem tells us for whom particular instrumental variables (IV) and...

Quantitative criminology focuses on straightforward causal questions that are ideally addressed with randomized experiments. In practice, however, traditional randomized trials are difficult to implement in the untidy world of criminal justice. Even when randomized trials are implemented, not...

Individual outcomes are highly correlated with group average outcomes, a fact often interpreted as a causal peer effect. Without covariates, however, outcome-on-outcome peer effects are vacuous, either unity or, if the average is defined as leave-out, determined by a generic intraclass...

We develop a theoretical model to explain both the high level and persistence in gun violence for black males ages 15-24 consistent with the empirical literature. A person may carry a gun for instrumental (i.e., criminal) reasons or for its perceived protective benefit. Discerning underlying...

Homelessness may be both a cause of and one of the more extreme outcomes of poverty. Governments at all levels have a variety of tools to combat homelessness, and these strategies have changed dramatically over the past quarter century. In this paper, we catalog the policy responses, the...

Overdose deaths involving opioids have increased dramatically since the mid-1990s, leading to the worst drug overdose epidemic in U.S. history, but there is limited empirical evidence on the initial causes. In this paper, we examine the role of the 1996 introduction and marketing of OxyContin as...

We examine the role of state and local policies to encourage social distancing, including stay at home orders, public school closures, and restrictions on restaurants, entertainment, and large social gatherings. Outcomes come from cell phone records and include foot traffic in six industries...

We examine the impact of the drug crisis that has unfolded over the last three decades in the United States on children's living arrangements and environments. Because the current living arrangement could be a result of events that occurred at any point in a child's life, we measure children's...

The COVID-19 pandemic in the US has been particularly devastating for nursing home residents. A key question is how have some nursing homes been able to effectively protect their residents, while others have not? Using data on the universe of US nursing homes, we examine whether establishment...

The 1993 expansions of the Earned Income Tax Credit created the first meaningful separation in the benefit level for families based on the number of children, with families containing two or more children now receiving substantially more in benefits. If income is protective of health, we should...