Abstract Details
Activity Number:
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118
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Type:
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Topic Contributed
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Date/Time:
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Monday, August 4, 2014 : 8:30 AM to 10:20 AM
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Sponsor:
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Survey Research Methods Section
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Abstract #311403
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View Presentation
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Title:
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Creating a Flexible and Scalable Psu Sample for Nhtsa's New National Automotive Sampling System
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Author(s):
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Martha Rozsi*+ and William Cecere and Sharon Lohr and James Green
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Companies:
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Westat and Westat and Westat and Westat
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Keywords:
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Primary sampling units ;
sample design ;
stratification ;
scalable sample size
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Abstract:
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The new National Automotive Sampling System (NASS) sample design requires a flexible and scalable PSU sample to be able to respond to future budgetary constraints and data precision needs. The future sample for the NASS could have between 16 primary sampling units (PSUs) and 101 PSUs for the General Estimates System (GES) module, and between 16 PSUs and 96 PSUs for the Follow-on Passenger Vehicle (FOPV) module. We describe a mechanism for drawing a PSU sample that allows the PSU sample size to change in the future while maintaining a high level of PSU stratification. Conditional probabilities are formulated that allow the PSUs in the largest PSU sample to be subsampled as needed to meet future budgetary constraints.
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Authors who are presenting talks have a * after their name.
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