summclust is an R module for cluster level measures of leverage and influence, and further implements CRV3 and CRV3J cluster robust variance estimators.

For an introduction to the package, take a look at its vignette.

For a quick overview of different CRV estimators, take a look at the cluster robust variance estimation vignette.

For a very detailed description of the implemented methods, in particular a discussion of the different leverage and influence metrics, see:

MacKinnon, J.G., Nielsen, M.Ø., Webb, M.D., 2022. Leverage, influence, and the jackknife in clustered regression models: Reliable inference using summclust. QED Working Paper 1483. Queen’s University.

For the Stata version of the package, see here.

## Installation

You can install the development version of summclust from CRAN, GitHub and r-universe with:

# install from CRAN
install.packages('summclust')

# from r-universe (windows & mac, compiled R > 4.0 required)
install.packages('summclust', repos ='https://s3alfisc.r-universe.dev')

# install.packages("devtools")
devtools::install_github("s3alfisc/summclust")