D. Wayne Osgood is professor of crime, law, justice, and sociology in the Department of Sociology at Pennsylvania State University. E. Michael Foster is professor of maternal and child health in the School of Public Health at the University of North Carolina at Chapel Hill. Constance Flanagan is professor in the Department of Agricultural and Extension Education at Pennsylvania State University. Gretchen R. Ruth is a research associate at Chapin Hall Center for Children, University of Chicago.