2011 report by the U.S. Census Bureau with data on health insurance coverage, income and poverty levels.
2011 report by the Pew Research Center compared data from the Survey of Income Program and Participation (SIPP) in 2005 and 2009.
2011 report by the Pew Hispanic Center on demographic trends relating to undocumented immigrants in the United States.
2010 study from Duke University on links between poverty, government assistance and health problems in the United States.
2011 GAO report on criminal activity by undocumented immigrants, their nationality and the estimated costs of such criminality to the United States.
Report from U.S. federal joint commission updating legal and human rights overview of China.
2010 study in Political Science Quarterly on qualities and representative nature of U.S. primary election caucuses.
2011 study by RAND Corporation on the potential of educational programs in minimizing summer learning losses and their associated costs.
2011 study in American Journal of Epidemiology on how depression rates are affected by types and qualities of city neighborhoods.
2010 study in Journal of Social Issues on global reception of new immigrants and cultural factors that produce negative attitudes toward them.