The simITS Package

This package is for analyzing ITS designs with parametric simulation and extrapolation

Active code is on github, with clean releases posted to CRAN.

How to learn how to use this package

I would recommend starting by reading the methods overview paper, “Using Simulation to Analyze Interrupted Time Series Designs”, on ArXiV

There is also a vignettes in the package that walks through almost everything.


The post-stratified ITS code is both messier and less developed. There are multiple ways one might adjust for time-varying covariates, and this is an active area of ongoing research. Buyer beware!

Making contributions

You are most welcome to check out a copy from github and play with the code. All suggestions and improvements most welcome!