This excerpt from the “masterful, timely, data-driven” study of the gun control debate examines the potential of stronger purchasing laws (Choice). As the debate on gun control continues, evidence-based research is needed to answer a crucial question: How do we reduce gun violence? One of the biggest gun policy reforms under consideration is the regulation of firearm sales and stopping the diversion of guns to criminals. This selection from the major anthology of studies Reducing Gun Violence in America presents compelling evidence that stronger purchasing laws and better enforcement of these laws result in lower gun violence. Additional material for this edition includes an introduction by Michael R. Bloomberg and Consensus Recommendations for Reforms to Federal Gun Policies from the Johns Hopkins University.

This Research Brief summarizes research on law enforcement and community-led initiatives which have research evidence to support their effectiveness in preventing illegal gun trafficking and gun violence.

Ecological models of the determinants of health and the consequent importance of structural interventions have been widely accepted. Operationalizing these models in research and practice has been challenging. Examining the role of criminal law enforcement in the "risk environment" of injection drug users (IDUs) provides an opportunity to apply structural thinking to the health problems associated with drug use. This paper reviews international evidence that laws and law enforcement practices influence IDU risk. It argues that more research is needed at four levels - laws; management of law enforcement agencies; knowledge, attitudes, beliefs and practices of front-line officers; and attitudes and experiences of IDUs - and that such research can be the basis of interventions within law enforcement to enhance IDU health.