JSM 2005 Online Program

Abstract #302996

This is the preliminary program for the 2005 Joint Statistical Meetings in Minneapolis, Minnesota. Currently included in this program is the "technical" program, schedule of invited, topic contributed, regular contributed and poster sessions; Continuing Education courses (August 7-10, 2005); and Committee and Business Meetings. This on-line program will be updated frequently to reflect the most current revisions.

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Activity Number:	238
Type:	Contributed
Date/Time:	Tuesday, August 9, 2005 : 8:30 AM to 10:20 AM
Sponsor:	Section on Survey Research Methods
Abstract - #302996
Title:	Analysis of Census 2000 Long Form Variances
Author(s):	Eric L. Schindler*+
Companies:	U.S. Census Bureau
Address:	Suitland Federal Center, Washington, DC, 20233, United States
Keywords:	Successive Differences ; Jackknife ; Raking
Abstract:	The Census 2000 Long Form consisted of approximately a 15% systematic sample of persons. Some 60,000 weighting areas were formed and final weights were calculated using an iterative proportional fitting (raking) procedure. Both the systematic sample and the raking are designed to reduce variance. A successive difference replication (SDR) methodology was developed to estimate the variances so to properly reflect the variance gains of the systematic sample. Due to operational constraints, the replicate weights did not fully reflect the raking used for estimation. The replicates reflected only the effect of controlling on total population. Thus, the reduction in variances due to raking was not reflected in the variance estimates which, as a result, should overestimate the true variance. Standard errors were estimated for a large number of subtotals in each weighting area, outliers were removed, and generalized design factors were calculated. This paper examines the consequences of not raking to reweigh each replicate by comparing variance estimates with or without the replication of the raking procedure for the SDR method and a simple jackknife method.

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