Provides functions for multivariate and propensity score matching
and for finding optimal balance based on a genetic search algorithm.
A variety of univariate and multivariate metrics to
determine if balance has been obtained are also provided. For
details, see the paper by Jasjeet Sekhon
(2007,
Jasjeet S. Sekhon
This website is for the distribution of "Matching" which is a R package for estimating causal effects by multivariate and propensity score matching. The package provides functions for multivariate and propensity score matching and for finding optimal balance based on a genetic search algorithm. A variety of univariate and multivariate tests to determine if balance has been obtained are also provided. These tests can also be used to determine if an experiment or quasi-experiment is balanced on baseline covariates.
For an introduction to the package with documentation and examples, please see "Multivariate and Propensity Score Matching Software with Automated Balance Optimization: The Matching package for R." Journal of Statistical Software, 42(7): 1-52. 2011.
A version is on CRAN. The latest development version can be installed directly from Github using devtools.
if (!require("devtools")) install.packages("devtools")devtools::install_github("JasjeetSekhon/Matching")The package contains compiled code, and you must have a development
environment to install the development version. (Use
devtools::has_devel() to check whether you do.) If no development
environment exists, Windows users download and install
Rtools and macOS
users download and install
Xcode.