Joel William Grube is Adjunct Professor in Health and Social Behavior at UC Berkeley’s School of Public Health. His research broadly focuses on social-psychological and environmental factors influencing alcohol, tobacco, drug use, and other risky behaviors among adolescents and young adults. His recent projects include longitudinal studies of policy and other community influences on smoking and drinking trajectories among adolescents; a randomized community trial examining the effects of reducing access to alcohol on adolescents’ drinking; and a randomized community trial investigating the effects of family, school and retailer interventions to reduce access to and misuse of inhalants and other harmful legal products by adolescents in rural Alaska communities. He is currently collaborating on a project implementing community and individual interventions to reduce drinking and other drug use among adolescents on nine American Indian reservations. An additional research focus is on adolescents’ marijuana use, marijuana policy, and social-environmental and contextual factors that influence its use and associated harms. He has a strong background in survey research, ecological momentary assessment (EMA), and geographical momentary assessment (GMA) methods and in quantitative data analysis, including multilevel modeling, latent variable structural equation modeling, and related techniques.