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Contains the core methods for the evaluation of principal surrogates in a single clinical trial. Provides a flexible interface for defining models for the risk given treatment and the surrogate, the models for integration over the missing counterfactual surrogate responses, and the estimation methods. Estimated maximum likelihood and pseudoscore can be used for estimation, and the bootstrap for inference. A variety of postestimation summary methods are provided, including print, summary, plot, and testing.
Package details 


Author  Michael C Sachs [aut, cre], Erin E Gabriel [aut] 
Maintainer  Michael C Sachs <sachsmc@gmail.com> 
License  MIT + file LICENSE 
Version  1.3.1 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

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