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CCM – Census Coverage Measurement

2010 Census Coverage Measurement Survey Update 2010 State Data Center/ Census Information Center Steering Committee Meeting February 23, 2010 Thomas Mule US Census Bureau. CCM – Census Coverage Measurement.

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CCM – Census Coverage Measurement

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  1. 2010 Census Coverage Measurement Survey Update2010 State Data Center/Census Information CenterSteering Committee MeetingFebruary 23, 2010Thomas MuleUS Census Bureau

  2. CCM – Census Coverage Measurement • Survey provides estimates of coverage error for people in housing units and for housing units: • Excludes group quarters and remote Alaska • Includes Puerto Rico • No intent to adjust the census

  3. Net Error • Uses dual-system estimation, a sample capture-recapture technique • Used in 1980, 1990, and 2000 • Provides estimates of net undercount and overcount • Key demographic groups • Specific geographic areas • Requires independence from census

  4. Components of Census Coverage Error • New objective for 2010 • Provides estimates of: • Correct enumerations – those included correctly by the census • Erroneous enumerations – those included incorrectly by the census • Imputations • Omissions – those missed by the census • Key demographic groups and by census operations

  5. 2000 A.C.E. Measurement Error • 2000 coverage measurement program failed to detect erroneous enumerations • Many were census duplicates • CCM Goal: Reduce nonsampling error from the 2000 Accuracy and Coverage Evaluation (A.C.E.)

  6. Sample Design of 2010 CCM • Area sample of block clusters – groups of census collection blocks • Population (P) Sample: Independent sample of housing units in block clusters. Recapture sample. • Enumeration (E) Sample: Census enumerations in the same sample block clusters

  7. Independent Listing • Independent listing of area sample • Canvass block cluster • List addresses of housing units and potential housing units • Timing: August-December 2009

  8. Person Interview • Laptop interview at independently listed addresses • Personal visit • Gather independent roster of people • Probing questions about places where the person: • Should have been counted • Could have been counted • Timing: August-October 2010

  9. Person Matching and Followup • Match people collected in CCM to census person list • Computer • Clerical • Search throughout the country • Computer nationwide search • Clerical search at places the person could have been counted from the person interview • Person Followup (personal visit and telephone, paper-based) • Timing: October 2010 – April 2011

  10. Current Plans for Estimation Domains for 2010 CCM • Estimation domains have not been finalized so products shown here are current plans • Break into 3 Major Groupings: • Demographic/housing unit characteristic groups • Geographic areas • Census operation results

  11. Examples of Estimation Domains for Demographic Groupings for People in Housing Units

  12. Examples of Estimation Domains for Geographic Areas for People in Housing Units

  13. Examples of Estimation Domains for Census Operations for People in Housing Units

  14. What about those people who should have been enumerated somewhere else? • A table to show people who should been enumerated outside our block cluster search area. • Same county • Different county in the same state • Different state

  15. Examples of Estimation Domains for HU Characteristics for Housing Units

  16. Examples of Estimation Domains for Geographic Areas for Housing Units

  17. Examples of Estimation Domains for Census Operations for Housing Units

  18. Housing units that were geocoded incorrectly • A table to show housing unit geocoding results in relation to block cluster search area • Geocoded to block cluster • Geocoded one block outside of the cluster • Geocoded beyond one block outside of the cluster

  19. Reducing Nonsampling Error in the CCM • Part of Decennial review conducted by Director Groves • Identified areas in the CCM where efforts can be made to reduce nonsampling error

  20. CCM Sample Size • Reduced from 300,000 to 170,000 housing units • American Indian Reservation and Hawaii sample remain same • 1,000 target minimum state housing unit sample size

  21. 2010 Evaluations and Assessments • Evaluations • Goals • Examine results of 2010 • Improve 2020 • Assessments • Every operation

  22. Thanks! vincent.t.mule.jr@census.gov

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