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Activity Number:
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60
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Type:
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Topic Contributed
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Date/Time:
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Sunday, August 2, 2009 : 4:00 PM to 5:50 PM
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Sponsor:
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Section on Survey Research Methods
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| Abstract - #304017 |
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Title:
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Evaluation of PPS Sampling for the Medical Expenditure Panel Survey
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Author(s):
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Robert M. Baskin and Steven Machlin*+ and William Yu
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Companies:
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Agency for Healthcare Research and Quality and Agency for Healthcare Research and Quality and Agency for Healthcare Research and Quality
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Address:
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540 Gaither Road, Rockville, MD, 20850,
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Keywords:
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MEPS ; PPS sampling ; effective sample size
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Abstract:
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Households in the Medical Expenditure Panel Survey (MEPS) are drawn as a sub-sample of respondents to the prior year's National Health Interview Survey (NHIS). The procedure used for selecting MEPS samples for 1996-2009 was to stratify the NHIS eligible frame and select units systematically within strata. Sampling rates were designed to improve precision for targeted subgroups over that expected from a design without stratification. A strategy to reduce the variance of MEPS weights is to use PPS sampling with the NHIS weights as measure of size. While this strategy would reduce the variance in sampling weights and improve the precision of national estimates, PPS sampling in the absence of stratification does not insure minimum precision levels for minority subpopulations of interest. This analysis evaluates the potential gains/tradeoffs of various PPS sampling options for MEPS.
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