Dr. Silvia S. Martins is a faculty member of the Psych-Neuro cluster of the Department of Epidemiology, Columbia University Mailman School of Public Health. She is also currently the co-director of the NIDA T32 Substance Abuse Epidemiology Training Program in the department and the Course Director of Principles of Epidemiology (P6400). Her current research focuses on environmental and individual factors associated with substance use and substance use disorders, psychiatric disorders in the U.S. general population and gambling/problem gambling in Puerto Rican Youth. She has led six federally funded (two of which are active–1R01 HD060072 and 1R01 DA037866) and three privately funded research studies over the past-decade. Her research portfolio has included NIDA-NIH funded studies to investigate trends in nonmedical prescription opioid use and opioid use disorder in the U.S. populations and a recently-funded study to investigate the effects of state-level marijuana laws on the prevalence of marijuana use among adolescents and adults as well as other consequences potentially related to the implementation of these laws. She is also the principal investigator of a project to examine the effects of urban violence in the development of psychopathology among youth in Brazil. Dr. Martins currently collaborates with researchers in other U.S. institutions, Canada, Brazil, Lebanon, and France