2009 RAND Corporation study based on data from more than 600 charter schools.
2009 meta-analysis by the Institute of Medicine of 11 U.S. and European studies on the health effects of smoking bans.
2009 study by the Harvard Medical School and the Cambridge Health Alliance on the relationship between health insurance and death rates.
2007 McMaster University survey published in Open Medicine comparing 38 studies that look at outcomes of medical care in the two countries.
2004 American Education Research Association study in the Review of Education Research comparing the results of 232 studies of distance education.
2006 metastudy on the effect of prison education programs on recidivism and post-incarceration employment rates.
2008 Harvard, Duke and University of California study on the contributions of highly skilled and educated immigrants to the United States economy.