DOI: 10.3886/icpsr13400.v1
title: Census of Population and Housing, 2000 [United States]: Public Law (P.L.) 94-171 Adjusted Data
title: Version 1

description: 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).
description: 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..
description: Datasets: 
 
 DS0: Study-Level Files 
 DS1: Alabama 
 DS2: Alaska 
 DS4: Arizona 
 DS5: Arkansas 
 DS6: California 
 DS8: Colorado 
 DS9: Connecticut 
 DS10: Delaware 
 DS11: District of Columbia 
 DS12: Florida 
 DS13: Georgia 
 DS15: Hawaii 
 DS16: Idaho 
 DS17: Illinois 
 DS18: Indiana 
 DS19: Iowa 
 DS20: Kansas 
 DS21: Kentucky 
 DS22: Louisiana 
 DS23: Maine 
 DS24: Maryland 
 DS25: Massachusetts 
 DS26: Michigan 
 DS27: Minnesota 
 DS28: Mississippi 
 DS29: Missouri 
 DS30: Montana 
 DS31: Nebraska 
 DS32: Nevada 
 DS33: New Hampshire 
 DS34: New Jersey 
 DS35: New Mexico 
 DS36: New York 
 DS37: North Carolina 
 DS38: North Dakota 
 DS39: Ohio 
 DS40: Oklahoma 
 DS41: Oregon 
 DS42: Pennsylvania 
 DS44: Rhode Island 
 DS45: South Carolina 
 DS46: South Dakota 
 DS47: Tennessee 
 DS48: Texas 
 DS49: Utah 
 DS50: Vermont 
 DS51: Virginia 
 DS53: Washington 
 DS54: West Virginia 
 DS55: Wisconsin 
 DS56: Wyoming 
 DS72: Puerto Rico
description: Census of Population and Housing, 2000 [United States] Series
description: 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.
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.
The data file part numbers are not consecutive. They correspond to FIPS codes for states.
description: All persons and housing units in the United States in 2000.