**GAO-10-324**                      Published: Apr 23, 2010. Publicly Released: Apr 23, 2010.                  

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## Highlights

Assessing the accuracy of the census is essential given that census data are used to apportion seats in Congress, to redraw congressional districts, and for many other public and private purposes. The U.S. Census Bureau's (Bureau) Census Coverage Measurement program (CCM) is to assess the accuracy of the 2010 Census and improve the design of operations for the 2020 Census. In April 2008, GAO recommended that the Bureau identify how it would relate CCM results--where the 2010 Census was accurate and inaccurate--to census operations to improve future censuses. Knowing where the 2010 Census was inaccurate can help inform research to improve the 2020 Census. GAO was asked to examine (1) the status of CCM planning and (2) the effects of design decisions since GAO issued its April 2008 report. GAO reviewed Bureau documents related to CCM design and National Academy of Sciences reports, and interviewed responsible Bureau officials.

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Robert N. Goldenkoff
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## Topics

Government Operations

AccountabilityCensusData collectionData integrityErrorsEvaluation methodsPerformance measuresPlanningPopulation statisticsProgram evaluationStatistical methodsStrategic planningSystems designDatabasesInformation systemsQuality improvementProgram goals or objectivesProgram implementation