Variance Estimation for Stratified Propensity Score EstimatorsE. J. Williamson,R. Morley,A. Lucas,J. R. CarpenterStatistics in Medicine(2012)引用 24|浏览10关键词confounding,inverse probability weighting,observational studyAI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要