Principal Causal Effect Identification and Surrogate end point Evaluation by Multiple Trials
Principal Causal Effect Identification and Surrogate end point Evaluation by Multiple Trials
Summary Principal stratification is a causal framework to analyse randomized experiments with a post-treatment variable between the treatment and end point variables. Because the principal strata defined by the potential outcomes of the post-treatment variable are not observable, we generally cannot identify the causal effects within principal strata. Motivated by …