"Lynne M. Casper" received her Ph.D. in demography and sociology from Penn State in 1992. She is currently Health Scientist Administrator and Demographer in the Demographic and Behavioral Sciences Branch at the National Institute of Child Health and Human Development. She is also director of NICHD s training program in population studies and is program officer for many national data collection efforts. She has published numerous scholarly articles in the areas of families and households, cohabitation, fatherhood, childcare, voting and demographic methods. She previously spent 7 years as a Dem