The General Social Survey (GSS), a project of the National Social Science Data Program, conducts basic scientific research on the structure and development of American society with a data-collection program designed to both monitor social change within the United States and to compare the United States to other nations.
The Sentencing Project website provides information on sentencing, incarceration, racial disparity in the criminal justice system, drug policy, and felony disenfranchisement in the U.S., including comprehensive coverage of issues related to overreliance on an incarceration strategy.