22 citations · 92 across the 14 of their papers we have counts for
5 papers · 1 filter
Novel Criteria to Exclude the Surrogate Paradox and Their Optimalities
Yunjian Yin, Lan Liu, Zhi Geng +1
When the primary outcome is hard to collect, surrogate endpoint is typically used as a substitute. However, even when the treatment has a positive average causal effect (ACE) on th…
Identifiability of Normal and Normal Mixture Models With Nonignorable Missing Data
Wang Miao, Peng Ding, Zhi Geng
Missing data problems arise in many applied research studies. They may jeopardize statistical inference of the model of interest, if the missing mechanism is nonignorable, that is,…
Principal causal effect identification and surrogate endpoint evaluation by multiple trials
Zhichao Jiang, Peng Ding, Zhi Geng
Principal stratification is a causal framework to analyze randomized experiments with a post-treatment variable between the treatment and endpoint variables. Because the principal…
Qualitative Evaluation of Associations by the Transitivity of the Association Signs
Zhichao Jiang, Peng Ding, Zhi Geng
We say that the signs of association measures among three variables {X, Y, Z} are transitive if a positive association measure between the variable X and the intermediate variable…
Identifiability of Subgroup Causal Effects in Randomized Experiments with Nonignorable Missing Covariates
Peng Ding, Zhi Geng
Although randomized experiments are widely regarded as the gold standard for estimating causal effects, missing data of the pretreatment covariates makes it challenging to estimate…