A standard core of demographic and attitudinal questions, plus topics of special interest. Many of the core questions have remained unchanged since 1972 to facilitate time trend studies as well as replication of earlier findings.
Census and survey data from the United States and from around the world, integrated across time and space. Coverage varies among data sets, oldest US census data from 1790.
Archives of social science data, specializing in data from surveys of public opinion. Most of the data are from the United States, but over 50 nations are represented. 1930s-current