and imputation process provided imputations for missing basic (complete-count) characteristics on the E-sample records (see Appendix G). Finally, probabilities of being a Census Day resident and of matching the census were assigned to P-sample people with unresolved status, and probabilities of being a correct enumeration were assigned to E-sample people with unresolved enumeration status.


Estimation of the DSE for poststrata and the variance associated with the estimates was the final step in the A.C.E. process. The poststrata were specified in advance on the basis of research with 1990 census data (see Griffin and Haines, 2000), and each E-sample and P-sample record was assigned to a poststratum as applicable. Poststrata that had fewer than 100 cases of nonmovers and outmovers were combined with other poststrata for estimation. In all, the originally defined 448 poststrata, consisting of 64 groups defined by race/ethnicity, housing tenure, and other characteristics cross-classified by seven age/sex groups (see Table E.3), were reduced to 416, by combining age/sex groups as needed within one of the other poststrata.

Weighted estimates were prepared for each of the 416 poststrata for the following:

  • P-sample total nonmover cases (NON), total outmover cases (OUT), 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);

  • P-sample matched nonmover cases (MNON) and matched outmover cases (MOUT) (including multiplication of the weights by match status probability, which was 1 for known matches and 0 for confirmed nonmatches);

  • E-sample total cases (E); and

  • E-sample correct enumeration cases (CE) (including multiplication of the weights by correct enumeration status probability).

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