New Population Center Working Paper (PSC/PARC): Amin, Vikesh, Jere Behrman, Jason Fletcher, Carlos Flores, Alfonso Flores-Lagunes, and Hans-Peter Kohler. 2019. "Mental Health, Schooling Attainment and Polygenic Scores: Are There Significant Gene-Environment Associations?." University of Pennsylvania Population Center Working Paper (PSC/PARC), 2019-24.
U.S. fertility rates are at an all-time low, partially due to delayed parenthood, increased childlessness, fewer unplanned teenage pregnancies, and declines in immigration. As explained by Hans-Peter Kohler, Pilar Gonalons-Pons, and Emilio Alberto Parrado in Penn Today, the drop isn’t cause for alarm but does bring to light questions about work, family, and immigration policies that can affect population growth.
Director, Population Aging Research Center
Frederick J. Warren Professor of Demography
Professor of Sociology
Chair, Graduate Group Demography
Ph.D., Economics, University of California, Berkeley, 1997