1990 Census:

Applying PES Results and Evaluations to the Adjustment Decision

T-GGD-91-49: Published: Jun 27, 1991. Publicly Released: Jun 27, 1991.

Additional Materials:


Office of Public Affairs
(202) 512-4800

GAO discussed the results of the 1990 Census Post Enumeration Survey (PES), to determine whether to adjust the 1990 census counts. GAO noted that: (1) PES estimated a net undercount of about 2.1 percent of the enumerated resident population of 248.7 million, or about 5.3 million persons, and the net undercount, based on demographic analysis, was about 1.8 percent, or about 4.7 million persons; (2) an approach focusing on double-counts and missed persons indicated that the 1990 census included about 14.1 million errors, including a gross census undercount of about 9.7 million persons; (3) the Census Bureau's lack of improvement in reducing the undercount, its differential nature, and the extent of its census errors reinforce the importance of census reform; (4) accelerated time schedules limited the Census Bureau's ability to analyze the results of its 20 PES evaluations; (5) due to sampling variations, the Census Bureau could not ensure the accuracy of its evaluation of total PES error; (6) the Census Bureau's evaluation of the combined effect of sampling and nonsampling error in PES determined that the national undercount was between 1.23 percent and 2.20 percent at a 95-percent confidence level; and (7) the Secretary of Commerce will need to determine whether PES results were sufficiently precise to ensure census count accuracy at all levels of geography.

Nov 24, 2020

Nov 23, 2020

Nov 18, 2020

Nov 16, 2020

Oct 7, 2020

Sep 25, 2020

Sep 23, 2020

Sep 10, 2020

Looking for more? Browse all our products here