Neighborhood Context and Psychological Distress among Older Taiwanese Adults: Relationships over Time • Chi Chiao, National Yang Ming University ; Li-Jen Weng, National Taiwan University ; Amanda Botticello, Kessler Medical Rehabilitation Research and Education Corporation

Selection or Causation? Using Marginal Structural Models to Estimate the Causal Effect of Neighborhood Disadvantage on Alcohol Use and Misuse • Magdalena Cerda, The New York Academy of Medicine ; Ana Diez Roux, University of Michigan ; Eric Tchetgen, Harvard School of Public Health ; Penny Gordon-Larsen, University of North Carolina at Chapel Hill ; Catarina Kiefe, University of Alabama at Birmingham

Examining the Role of Social Networks and Herd Immunity in a Cholera Vaccine Trial in Bangladesh • Sophia Giebultowicz, University of North Carolina at Chapel Hill ; Elisabeth D. Root, University of North Carolina at Chapel Hill ; Michael Emch, University of North Carolina at Chapel Hill