This is the program for the 2010 Joint Statistical Meetings in Vancouver, British Columbia.

Abstract Details

Activity Number: 639
Type: Contributed
Date/Time: Thursday, August 5, 2010 : 8:30 AM to 10:20 AM
Sponsor: Section on Survey Research Methods
Abstract - #307111
Title: Design Effects for Totals in Multi-stage Samples
Author(s): Keith Rust*+ and Pam Broene
Companies: Westat and Westat
Address: 1600 Research Blvd, Rockville, MD, 20850,
Keywords: Sample redesign ; establishment survey ; occupational injuries and illnesses

After the completion of a survey with a given design, often one wishes to modify the design, based on the data collected, so as to increase the efficiency of the design for future use. In multi-stage samples one often uses the concept of a design effect to summarize the efficiency of a design for a particular survey estimator. For estimators of totals this concept is difficult to define, since for a simple random sample, the basis for comparison when calculating design effects, the population size is known. We present an approach for evaluating potential revisions to a two-stage design, where the sample estimators of primary interest are population and subgroup totals. An example is shown for a design to sample emergency room visits from hospitals. The approach uses the fact that estimators of population totals and subgroup proportions often have small correlations.

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