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Activity Number:
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327
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Type:
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Contributed
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Date/Time:
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Tuesday, August 4, 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 - #305262 |
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Title:
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Using Predictive Marginals to Produce Standardized Estimates
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Author(s):
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Kathryn Spagnola*+ and Michael B. Witt
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Companies:
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RTI International and RTI International
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Address:
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3040 Cornwallis Rd., Durham, NC, 27709,
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Keywords:
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Standardization ; Predictive Marginals ; Survey Analysis ; Military
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Abstract:
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Researchers often attempt to compare the prevalence of an attribute between subgroups of a population or between time periods. To account for distributional differences, one solution is to examine the difference between standardized estimates. We will discuss creating standardized estimates via the predictive marginals approach with data from SAMHSA and DoD studies. The predictive marginal approach is a generalization of the direct standardization technique and can be useful when controlling for a large number of effects during the standardization process. Another alternative approach to standardized estimates is direct estimates that are produced using weights from a model based weight adjustment. This weight adjustment will force the sum of weights in each subgroup to match across the main effects in the model.
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