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Activity Number:
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167
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Type:
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Contributed
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Date/Time:
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Monday, August 3, 2009 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Survey Research Methods
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| Abstract - #305691 |
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Title:
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An Evaluation of Weighting Methodology in an RDD Survey with Multiple Population Controls
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Author(s):
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Kennon R. Copeland*+ and Meena Khare and Nadarajasundaram Ganesh and Zhen Zhao
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Companies:
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NORC at the University of Chicago and CDC and NORC at the University of Chicago and CDC
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Address:
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4350 East-West Highway, Bethesda, MD, 20814,
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Keywords:
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Ratio adjustment ; Noncoverage bias ; Variance
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Abstract:
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To control potential noncoverage bias, ratio adjustment methods are often used to adjust survey population estimates to represent relevant subgroups in the target population. The National Immunization Survey (NIS)-a nationwide, list-assisted RDD survey fielded by the NORC for the Centers for Disease Control and Prevention-monitors the vaccination rates of children between the ages of 19 and 35 months. The NIS uses various ratio adjustment methods based on multiple population controls and distributions to adjust survey estimates. The NIS also utilizes the Keeter adjustment method using information on telephone service interruptions to adjust for noncoverage of nonlandline telephone households. This research evaluates the potential impact of adjusting across multiple population controls on survey weights, estimates, and variances, and seeks to identify a best strategy for refinements.
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