Handling parametric assumptions in principal causal effect estimation using Gaussian mixtures.

ABSTRACT: Given the latent stratum membership, principal stratification models with continuous outcomes naturally fit in the parametric estimation framework of Gaussian mixtures. However, with models that are not nonparametrically identified, relying on parametric mixture modeling has been mostly discouraged as a way of identifying principal effects. This study revisits this rather deserted use of parametric mixture modeling, which may open up various possibilities in principal stratification modeling. The main problem with using the parametric mixture modeling approach is that it is hard to assess the quality of principal effect estimates given its reliance on parametric conditions. As a way of assessing the estimation quality in this situation, this study proposes that we use parametric mixture mo

SUBMITTER: Jo B 

PROVIDER: S-EPMC9232942 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature