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An optimal two-step estimation approach for two-phase studies

Zhou, Qingning et al.
arXiv (All) · Papers
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methodology
Two-phase sampling is commonly adopted for reducing cost and improving estimation efficiency. In many two-phase studies, the outcome and some cheap covariates are observed for a large sample in Phase I, and expensive covariates are obtained for a selected subset of the sample in Phase II. As a resul
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