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Activity Number:
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451
- 125 Years of Representative Sampling: Important Contributions in the History of Survey Statistics
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Type:
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Topic Contributed
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Date/Time:
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Thursday, August 6, 2020 : 10:00 AM to 11:50 AM
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Sponsor:
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Survey Research Methods Section
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Abstract #310995
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Title:
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Ralph Folsom’s 1991 Social Statistics Proceedings Paper: A Seminal Contribution to Calibration Weighting for Nonresponse You Likely Never Heard Of
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Author(s):
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Jeremy Aldworth* and Phillip S Kott
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Companies:
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RTI International and RTI International
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Keywords:
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Raking;
Linear-regression weighting;
logistic response model
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Abstract:
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Deville and Särndal (1992) introduced the term “calibration weighting” to describe mild adjustments of the design weights in a survey sample that, in the absence of unit nonresponse, force weighted estimates for a vector of calibration variables to equal known population totals. They showed that linear-regression and raking weights were examples of calibration weights. Few know that Folsom (1991) employed what would later be called calibration equations to adjust for unit nonresponse. He showed that using raking weights leads to nearly unbiased estimated totals when the log of the probability of a unit response is a linear function of the raking variables. He also showed how to create calibration weights when the probability of unit response is a logistic function of the calibration variables. Folsom and collaborators would later expand upon his ideas and develop the GEM (general exponential model) methodology, which became the basis of the WTADJUST procedure in SUDAAN. This presentation will review his important contributions to calibration weighting, as well as point out a limitation of Deville and Särndal’s that Folsom’s work overcomes.
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Authors who are presenting talks have a * after their name.
