Two leading scholars will offer a plenary on cohabitation. Dr. Scott Stanley, Research Professor, Department of Psychology, and Co-Director of the Center for Marital and Family Studies at the University of Denver, will discuss risk and findings from an ongoing longitudinal study in his presentation. Dr. Pamela Smock, Professor of Sociology and Research Professor in the Population Studies Center, University of Michigan, will cite recent evidence from social science research and examine the meanings of cohabitation in the United States as they vary by social class, gender, and race/ethnicity.