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IPUMS, originally the Integrated Public Use Microdata Series, [1] is the world's largest individual-level population database. IPUMS consists of microdata samples from United States (IPUMS-USA) and international (IPUMS-International) census records, as well as data from U.S. and international surveys. The records are converted into a consistent ...
A Public Use Microdata Area (PUMA) is a geographic unit used by the US Census for providing statistical and demographic information. Each PUMA contains at least 100,000 people. PUMAs do not overlap, and are contained within a single state. PUMAs were first created for the 1990 Census. [1]
For example, the Integrated Public Use Microdata Series requires researchers to implement security measures, avoid redistribution of microdata, use microdata only for noncommercial research/education purposes, and not make any attempt to identify the individuals recorded. Names and fine-level geographical data are removed, some data items are ...
A clerk creating punch cards containing data from the census. Microdata from the 1950 census are freely available through the Integrated Public Use Microdata Series. Aggregate data for small areas, together with electronic boundary files, can be downloaded from the National Historical Geographic Information System. All identifiable information ...
Although the primary purpose of the CPS is to record employment information, the survey fulfills a secondary role in providing demographic information about the United States population. CPS microdata for the period since 1962 are freely available through the Integrated Public Use Microdata Series.
Census microdata for research purposes are available for all censuses from 1790 forward except for 1890 through the Integrated Public Use Microdata Series , and scanned copies of each of the decennial census questionnaires are available online from many websites.
The microfilmed census is available in rolls from the National Archives and Records Administration. Several organizations also host images of the microfilmed census online, along with digital indices. Microdata from the 1910 census are freely available through the Integrated Public Use Microdata Series.
Full documentation for the 1860 population census, including microdata, census forms and enumerator instructions, is available from the Integrated Public Use Microdata Series (IPUMS). Aggregate data for small areas, together with compatible cartographic boundary files, can be downloaded from the National Historical Geographic Information System.