Letter Report from the Panel to Review the 2000 Census (2001) / Chapter Skim
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Letter Report
Letter Report
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In our interim report, we concluded that the 2000 census was well executed in many respects although like every census there were some problems (National Research Council, 20011. The latest set of Census Bureau evaluations make it clear that there were considerably more errors of overcounting in the census than were originally estimated by the Accuracy and Coverage Evaluation (A.C.E.)
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These estimates show a reduction in 4See the panel's interim report (National Research Council, 2001) for explanations of the A.C.E., its two components (the independent P-sample and the E-sample of census enumerations in the A.C.E.
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in fact, it appears that the number of duplicates and other erroneous census enumerations in 2000 may have been as high as (or possibly higher than) the number estimated in 1990 from the PostEnumeration Survey (see National Research Council, 2001:Table 6-101.
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Such cases included college students who were counted both at their college dormitory and at their parents' household; prisoners who were counted both at prison and at their family's residence; children in joint custody who were counted in the homes of both parents; and people with more than one house, such as those who live part of the year in the South or West and the rest of the year in the North or Midwest. A subsequent study linked the duplicates identified in the Person Duplication Studies to the erroneous enumerations found in the EFU reanalysis subset of 17,500 persons with the goal of eliminating overlap (Fay, 20011.
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One option to explore is the feasibility of using computer matching techniques for households at likely risk of duplication as a means to reduce the number of duplicate enumerations in future censuses. 7As noted above, the 1990 Post-Enumeration Survey estimated a higher percentage of duplications and other kinds of erroneous enumerations than did the original A.C.E.
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IMPUTATIONS In our interim report (National Research Council, 2001:Ch.8) , we identified the relatively large number of census records for which all of the characteristics of the person had to be imputed as a major reason for the smaller differences in 2000 in estimated net undercount rates between historically less-well-counted and better-counted groups than in 1990.
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As we urged in our interim report (National Research Council, 2001:5) , the Census Bureau should increase its resources for demographic analysis, particularly for methods for improving estimates of net immigration.
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The estimates by race are an average of estimates calculated using two different tabulations of the census (see National Research Council, 2001:Ch.5)
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The Bureau should conduct further research on the unmeasured duplicate and other erroneous census enumerations and attempt to develop revised estimates of net undercount for the population and for major population groups. The Bureau should also conduct further research on the causes, quality, and effects of the larger number of census imputations and on demographic analysis components, particularly immigration.
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Executive Steering Committee for A.C.E. Policy II, Report 24.
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(September 241. National Research Council 2001 The 2000 Census: Interim Assessment.
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Served until March 2000 CHARGE OF THE PANEL TO REVIEW THE 2000 CENSUS The Panel to Review the 2000 Census was convened by the Committee on National Statistics. National Research Council, in fall 1998 at the request of the U.S.
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