A framework that brings together an abundance of common statistical models found across packages into a unified interface, and provides a common architecture for estimation and interpretation, as well as bridging functions to absorb increasingly more models into the package. Zelig allows each individual package, for each statistical model, to be accessed by a common uniformly structured call and set of arguments. Moreover, Zelig automates all the surrounding building blocks of a statistical workflowprocedures and algorithms that may be essential to one user's application but which the original package developer did not use in their own research and might not themselves support. These include bootstrapping, jackknifing, and reweighting of data. In particular, Zelig automatically generates predicted and simulated quantities of interest (such as relative risk ratios, average treatment effects, first differences and predicted and expected values) to interpret and visualize complex models.
Package details 


Author  Christine Choirat [aut], Christopher Gandrud [aut], James Honaker [aut], Kosuke Imai [aut], Gary King [aut], Olivia Lau [aut], Robert Treacy [aut, cre], IQSS Harvard University [cph] 
Maintainer  Robert Treacy <zelig.zee@gmail.com> 
License  GPL (>= 3) 
Version  5.1.7 
URL  https://cran.rproject.org/package=Zelig 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.