The 2000 Census Interim Assessment (2001) / Chapter Skim
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6. Accuracy and Coverage Evaluation: Overview
6. Accuracy and Coverage Evaluation: Overview
Pages 87-102
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From page 87... ...
COVERAGE PATTERNS, 2000 AND 1990 Table 6-1 shows net undercount rates and the associated 90 percent confidence intervals from the 2000 A.C.E. and the 1990 PES for race/ethnicity domains, age and sex, and housing tenure.2 (Separate population estimates iDemographic analysis (see Chapter 5)
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From page 88... ...
88 An To s:: Lit ¢ To to To Cal CO o o ·~ o =~ om of ~ ~ .
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From page 89... ...
Net undercount rates were also higher in both censuses for younger people than for those aged 50 and over, for whom there is a small estimated net overcount. The most pronounced difference in net undercount rates by age between 1990 and 2000 is for children under age 18, for whom the rate is significantly lower in 2000 (1.5%)
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From page 90... ...
. Coverage correction factors are the dual-systems estimate of the population divided by the census count.
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From page 91... ...
of estimated census coverage correction factors Tom the A.C.E. for some of the strongest relationships in the estimation, namely, that for owners and renters for each of seven race/ethnicity domains.5 While there is variation in the coverage correction factors for individual post-strata within each race/ethnicity and tenure group, renters have higher median coverage correction factors than owners in every race/ethnicity domain except for American Indians and Alaska Natives on reservations.
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From page 92... ...
These components are the proportion of the population correctly included in the census, which is estimated by the P-sample match rate, and the proportion of the census records that were correctly included, which is estimated by the E-sample correct enumeration rate: · The match rate is the weighted estimate, M, of P-sample persons who match with E-sample or other census persons, divided by the weighted estimate, P of all valid P-sample persons (including matches and nonmatches)
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From page 93... ...
· DSE is the dual-systems estimate of the post-stratum total population, psi · C - II is the census count, C, minus people requiring imputation and late additions to the census count, II, who are excluded from the E-sample because they cannot be matched to the P-sample;8 · CE/E is the weighted correct enumeration rate from the E-sample; and · P/M iS the inverse of the weighted match rate from the P-sample. For any post-stratum, the net undercount rate (UR)
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From page 94... ...
First, if there were no IIS, that is, no census enumerations that either lacked sufficient information or were added too late to be included in the A.C.E. matching, then the coverage correction factor, CCF, would be equivalent to the correction ratio, CR.
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From page 95... ...
drawing a large sample of block clusters and sending field staff to develop a complete address list for them, independent of the census Master Address File (MAP) ; · reducing the sample for medium and large block clusters (those with 3 to 79 housing units and 80 or more housing units, respectively)
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From page 96... ...
Initial Matching and Targeted Extended Search Once the P-sample survey was complete and the E-sample of census enumerations was drawn for the A.C.E. sample of block clusters, the first round of matching was conducted.
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From page 97... ...
process was estimation of the DSE and its associated variance for post-strata. Post-strata were prespecified to form 448 individual strata that grouped people by age, sex, race/ethnicity, housing tenure, and, in some cases, geographic region, a mail return rate for their neighborhood calculated for the A.C.E., and size of metropolitan area.
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From page 98... ...
American Indian or 0 2 groups: owner, renter Alaska Native off Reservationb 3. Hispanics O 4 groups for owners: ·: High and low mail return rate ·: By type of metropolitan statistical area (MSA)
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From page 99... ...
All non-Hispanic people with Black as their only race; all non-Hispanic people with Black and American Indian or Native Alaska race not in Indian Country; all non-Hispanic people with Black and another single race group, except those living in Hawaii with Black and Native Hawaiian or Pacific Islander race. ~ All non-Hispanic people with Native Hawaiian or Pacific Islander as their only race; all non-Hispanic people with Native Hawaiian or Pacific Islander and American Indian or Alaska Native race not in Indian Country; all non-Hispanic people with Native Hawaiian or Pacific Islander and Asian race; all people in Hawaii with Native Hawaiian or Pacific Islander as their single or one of multiple races.
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From page 100... ...
, the match rates calculated for outmovers were applied to the estimated number of inmovers as part of developing an overall match rate for each post-stratum. Also tabulated for each post-stratum was the census count and the count of IIS (people requiring imputation and late additions)
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From page 101... ...
This procedure is called PESB, which requires collecting Census Day address information for inmovers (people resident at the P-sample address on interview day but not on Census Day) and searching nationwide to determine if they were enumerated or missed at their reported Census Day residences.
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From page 102... ...
Targeted Extended Search Procedures Another important change from the 1990 PES concerned the TES procedure for searching surrounding blocks if a search in the sampled block cluster did not turn up a match for a P-sample household and to find out if misgeocoded E-sample cases were located nearby. In 1990, one ring, or sometimes two rings, of blocks surrounding each sample block cluster were searched for additional P-sample matches and E-sample correct enumerations.
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