Optimally Refine Strata

Splits initial strata into refined strata that optimize covariate balance. For more information, please see Brumberg, Small, and Rosenbaum (2024) . To solve the linear program, the 'Gurobi' commercial optimization software is recommended, but not required. The 'gurobi' R package can be installed following the instructions at < https://docs.gurobi.com/projects/optimizer/en/current/reference/r/setup.html> after claiming your free academic license at < https://www.gurobi.com/academia/academic-program-and-licenses/>.

optrefine

The goal of optrefine is to split existing strata (or none) into more refined strata that optimize covariate balance. Most often, propensity score strata are each split into two in order to achieve better covariate balance.

Installation

You can install the release version of optrefine from CRAN with:

install.packages("optrefine")

You can install the development version of optrefine from GitHub with:

# install.packages("devtools")
devtools::install_github("kkbrum/optrefine")