An alternative jackknife variance estimator when calibrating weights to adjust for unit nonresponse in a complex survey
Section 7. Discussion
There is a small chance (about 1.5% in our simulations) for
equation (4.4) to return negative replicate weights. The canned procedures of
many statistical packages (like SAS) cannot handle negative weights. Consequently,
estimated totals computed from replicate weights may need to be calculated
without the help of a canned procedure.
One does not need access to SUDAAN to compute
alternative jackknife weights for calibration estimators. The gencalib routines in the ‘Sampling’ package in R (Tillé and Matei, 2016) can perform
calibration not only under a bounded logistic response model but under linear
calibration as well. Although there are SAS macros equivalent to WTADJUST, to our
knowledge, there is currently no publicly-available SAS calibration-weighting
macro that can be used when
in the weight-adjustment (equation 4.4)
does not equal
Let us hope this is reversed soon.
Acknowledgements
The authors would like to thank the editors whose
helpful suggestions improved the quality of this note.
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ISSN : 1492-0921
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