Census of Population and Housing, 2000 [United States]: Public Law (P.L.) 94-171 Adjusted Data (ICPSR 13400)

Principal Investigator(s): United States Department of Commerce. Bureau of the Census

Summary: The numbers contained in this study are released pursuant to the order of the United States Court of Appeals for the Ninth Circuit in Carter v. Department of Commerce, 307 F.3d 1084. These numbers are not official Census 2000 counts. These numbers are estimates of the population based on a statistical adjustment method, utilizing sampling and modeling, applied to the official Census 2000 figures. The estimates utilized the results of the Accuracy and Coverage Evaluation (A.C.E.), a sample survey... (more info)

Series: Census of Population and Housing, 2000 [United States] Series

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United States Department of Commerce. Bureau of the Census. Census of Population and Housing, 2000 [United States]: Public Law (P.L.) 94-171 Adjusted Data . ICPSR13400-v3. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2013-05-24. doi:10.3886/ICPSR13400

Persistent URL: http://dx.doi.org/10.3886/ICPSR13400.v3

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Summary:   The numbers contained in this study are released pursuant to the order of the United States Court of Appeals for the Ninth Circuit in Carter v. Department of Commerce, 307 F.3d 1084. These numbers are not official Census 2000 counts. These numbers are estimates of the population based on a statistical adjustment method, utilizing sampling and modeling, applied to the official Census 2000 figures. The estimates utilized the results of the Accuracy and Coverage Evaluation (A.C.E.), a sample survey intended to measure net over- and undercounts in the census results. The Census Bureau has determined that the A.C.E. estimates dramatically overstate the level of undercoverage in Census 2000, and that the adjusted Census 2000 data are, therefore, not more accurate than the unadjusted data. On March 6, 2001, the Secretary of Commerce decided that unadjusted data from Census 2000 should be used to tabulate population counts reported to states and localities pursuant to 13 U.S.C. 141(c) (see 66 FR 14520, March 13, 2001). The Secretary's decision endorsed the unanimous recommendation of the Executive Steering Committee for A.C.E. Policy (ESCAP), a group of 12 senior career professionals within the Census Bureau. The ESCAP, in its recommendation against the use of the statistically adjusted estimates, had noted serious reservations regarding their accuracy. In order to inform the Census Bureau's planned October 2001 decision regarding the potential use of the adjusted estimates for non-redistricting purposes, the agency conducted extensive analyses throughout the summer of 2001. These extensive analyses confirmed the serious concerns the agency had noted earlier regarding the accuracy of the A.C.E. estimates. Specifically, the adjusted estimates were determined to be so severely flawed that all potential uses of these data would be inappropriate. Accordingly, the Department of Commerce deems that these estimates should not be used for any purpose that legally requires use of data from the decennial census and assumes no responsibility for the accuracy of the data for any purpose whatsoever. The Department, including the U.S. Census Bureau, will provide no assistance in the interpretation or use of these numbers. The collection contains four tables: (1) a count of all persons by race (Table PL1), (2) a count of Hispanic or Latino and a count of not Hispanic or Latino by race of all persons (Table PL2), (3) a count of the population 18 years and older by race (Table PL3), and (4) a count of Hispanic or Latino and a count of not Hispanic or Latino by race for the population 18 years and older (Table PL4).

Subject Terms:   census data, ethnicity, household composition, housing, housing conditions, population, states (USA)

Geographic Coverage:   Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Puerto Rico, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming

Time Period:  

• 2000

Date of Collection:  

• 2000

Universe:   All persons and housing units in the United States in 2000.

Data Types:   census/enumeration data

Data Collection Notes:

(1) The data are provided in three segments (files) per state: the Geographic Header, Tables PL1 and PL2, and Tables PL3 and PL4. The Geographic Header segments are fixed-format ASCII text files, while the Table segments are comma-delimited ASCII files. The Geographic Header has 80 variables and the Table segments have 149 variables each, for a total of 378 variables when the segments are combined. (2) The SAS Merge Program (Part 90) is provided, but not supported, by the United States Census Bureau. Users will need to merge the three segments for each state into a SAS dataset to use the data effectively. (3) The data file part numbers are not consecutive. They correspond to FIPS codes for states. (4) The codebook and record layout are provided by the principal investigator as Portable Document Format (PDF) files. The PDF file format was developed by Adobe Systems Incorporated and can be accessed using PDF reader software, such as the Adobe Acrobat Reader. Information on how to obtain a copy of the Acrobat Reader is provided on the ICPSR Web site.

Data Source:

self-enumerated questionnaires

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.

Original ICPSR Release:  2003-04-25

Version History:

• 2013-05-24 Multiple Census data file segments were repackaged for distribution into a single zip archive per dataset. No changes were made to the data or documentation.
• 2006-01-12 All files were removed from dataset 90 and flagged as study-level files, so that they will accompany all downloads.
• 2006-01-12 All files were removed from dataset 86 and flagged as study-level files, so that they will accompany all downloads.
• 2006-01-12 All files were removed from dataset 84 and flagged as study-level files, so that they will accompany all downloads.
• 2006-01-12 All files were removed from dataset 83 and flagged as study-level files, so that they will accompany all downloads.
• 2006-01-12 All files were removed from dataset 81 and flagged as study-level files, so that they will accompany all downloads.
• 2004-08-26 All the data definition statements (Parts 83, 84, and 90) were replaced because of errors. The codebook was replaced with an updated one from the Bureau of the Census.

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