Demographic Components of Change File of the United States, States and Counties, 1980-1990 (ICPSR 25361)
Principal Investigator(s): United States Department of Commerce. Bureau of the Census
The Population Estimates Program (PEP) produces for counties each year: total population estimates and county estimates by age, sex, race, and Hispanic origin. The release of total population estimates in the winter also includes demographic components of change. In the summer, the PEP releases the estimates by age, sex, race, and Hispanic origin. The reference date for county population estimates is July 1.
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United States Department of Commerce. Bureau of the Census . Demographic Components of Change File of the United States, States and Counties, 1980-1990. ICPSR25361-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2011-06-14. doi:10.3886/ICPSR25361.v1
Persistent URL: http://dx.doi.org/10.3886/ICPSR25361.v1
Scope of Study
Subject Terms: age, census county divisions, counties, demographic characteristics, demography, ethnicity, gender, population, population characteristics, population decrease, population estimates, population growth
Smallest Geographic Unit: county
Unit of Observation: county within state, state
Data Types: census/enumeration data
Data Collection Notes:
The April 1, 1990, Census figures are shown as originally tabulated and do not reflect any post-Census corrections or updates which may have occurred.
The Census Bureau's Population Estimates Program (PEP) produces July 1 estimates for years after the last published decennial census (1990), as well as for past decades. Existing data series such as births, deaths, federal tax returns, medicare enrollment, and immigration, are used to update the decennial census base counts. PEP estimates are used in federal funding allocations, in setting the levels of national surveys, and in monitoring recent demographic changes. A methodology reference accompanies most of the population estimates offerings.
Revisions to estimates and geographic detail:
With each new issue of July 1 estimates, PEP revises estimates for years back to the last census. Previously released estimates become superseded. Revisions to estimates are usually due to input data updates, changes in methodology, or legal boundary changes. The frequency of estimates and availability of demographic detail vary by geographic level.
Mode of Data Collection: record abstracts
Extent of Processing: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:
- Created variable labels and/or value labels.
- Checked for undocumented or out-of-range codes.
Original ICPSR Release: 2011-06-14
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