Abstract
Suojin Wang, Alan H. Dorfman, and Lawrence R Ernst (2004) "A New Variance Estimator for a Two-phased Restratified Sample with PPS Sampling at Both Phases."
In this paper we consider variance estimation for population totals and
ratios in complex, cross stratified
surveys in which the ultimate sampling weights are random variables,
dependent on the first
phase of sampling. A new hybrid variance estimator, dependent on both
model-based and design based
ideas, is introduced. Theoretical and empirical justifications are given
which demonstrate that
the proposed method handles well the difficult aspects of this sample
design.
Last Modified Date: July 19, 2008
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