The 2000 Census Interim Assessment (2001) / Chapter Skim
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Appendix C: A.C.E. Operations
Appendix C: A.C.E. Operations
Pages 195-204
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From page 195... ...
This appendix covers six topics: · sampling, address listing, and housing unit match; · P-sample interviewing; · initial matching and targeted extended search; · field follow-up and final matching; · weighting and imputation; and · post-strata estimation.
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From page 196... ...
. Systematic samples of block clusters were selected from each stratum using equal probabilities, yielding about 29,000 block clusters containing about 2 million housing units, which were then visited by Census Bureau field staff to develop address lists.
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From page 197... ...
Initial Housing Unit Match The addresses on the P-sample address listing were matched with the MAF addresses in the sampled block clusters. The purpose of this match was to permit automated subsampling of housing units in large blocks for both the Psample and the E-sample and to identify nonmatched P-sample and E-sample housing units for field follow-up to confirm their existence.
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From page 198... ...
198 THE 2000 CENSUS: INTERIM ASSESSMENT o~ a: CO - o CD o CO o Cal oh ¢ to o Cal .
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From page 199... ...
The computerized interview an innovation for 2000 was intended to reduce interviewer variance and to speed up data capture and processing by having interviewers send their completed interviews each evening over secure telephone lines to the Bureau's main computer center, in Bowie, MD. For the first three weeks, interviewers were instructed to speak only with a household resident; after then, they could obtain a proxy interview Tom a nonhousehold member, such as a neighbor or landlord.
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; computer imputation routines were used to complete their census records. Census terms for these people are "non-data-defined" and "whole person imputation;" we refer to them in this report as "people requiring imputation." In 2000, there were 5.8 million people requiring imputation, as well as 2.4 million late additions due to the special operation to reduce duplication in the MAP in summer 2000 (see Chapter 81.
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From page 201... ...
Three kinds of clusters were included in TES with certainty: clusters for which the P-sample address list was relisted; 5 percent of clusters with the most census geocoding errors and P-sample address nonmatches; and 5 percent of clusters with the most weighted census geocoding errors and P-sample address nonmatches. Clusters were also selected at random from among those clusters with P-sample housing unit nonmatches and census housing units identified as geocoding errors.
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From page 202... ...
For the P-sample weighting, an initial weight was constructed for housing units that took account of the probabilities of selection at each phase of sampling. Then a weighting adjustment was performed to account for household noninterviews.
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From page 203... ...
, and total inmover cases (IN) (including multiplication of the weights for nonmovers and outmovers by residence status probability, which was 1 for known Census Day residents and 0 for confirmed nonresidents)
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From page 204... ...
reduction and small block subsampling, and the targeted extended search sampling. The variance estimates also took account of the variability from imputation of correct enumeration, match, and residence probabilities for unresolved cases.
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