Getting Ahead or Losing Ground: Economic Mobility in America

Combines earlier research to present a comprehensive analysis of relative mobility, absolute mobility, and changes in income inequality. Focuses on intergenerational mobility, immigrants, comparisons by gender and race, and the role of education

Kids' Share 2010: Report on Federal Expenditures on Children

Examines 1960-2009 trends in federal spending and tax expenditures on children, including food stamps, tax credits, and Head Start. Analyzes the effects of American Recovery and Reinvestment Act funding, projected funding through 2020, and implications

How Targeted Are Federal Expenditures on Children? A Kids' Share Analysis of Expenditures by Income in 2009

Analyzes the distribution of government spending on children by family income; category, such as health, social services, and education; and program, such as Medicaid; and the extent to which it is targeted to low-income children. Considers implications

Ab initio calculations of the hydrogen bond

Recent x-ray Compton scattering experiments in ice have provided useful information about the quantum nature of the interaction between H$_2$O monomers. The hydrogen bond is characterized by a certain amount of charge transfer which could be determined in a Compton experiment. We use ab-initio simulations to investigate the hydrogen bond in H$_2$O structures by calculating the Compton profile and related quantities in three different systems, namely the water dimer, a cluster containing 12 water molecules and the ice crystal. We show how to extract estimates of the charge transfer from the Compton profiles.Comment: 16 pages, 7 figures, to appear in Phys. Rev.