Donald J. Hernandez, PhD, is Professor of Sociology at Hunter College and the City University of New York Graduate Center and Senior Advisor at the Foundation for Child Development. He conducted the first national study documenting reasons for the enormous changes experienced by children since the Great Depression in parental education and work, family composition, income and poverty. He directed the US Institute of Medicine/National Academies study on the health and well-being of children in immigrant families. He currently directs studies on income, race/ethnicity and immigrant disparities i...