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Type: Software Authors: Edwin Leuven and Barbara Sianesi
Stata module to perform full Mahalanobis matching and a variety of propensity score matching to adjust for pre-treatment observable differences between two groups. It further provides features for common support graphing as well as for covariate imbalance testing, both before and after matching.
More information about types of matching estimators and features.
Download
Recommended: To install the package (or get an update) from within net-aware Stata (version 8.1 or above):
ssc install psmatch2, replace
Alternatively, download the various components manually from http://ideas.repec.org/c/boc/bocode/s432001.html.
psmatch2 can be cited as follows:
Leuven, E. and Sianesi, B. (2003), "psmatch2: Stata module to perform full Mahalanobis and propensity score matching, common support graphing, and covariate imbalance testing", http://ideas.repec.org/c/boc/bocode/s432001.html., version x.x.x.
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 We have written free software to implement matching methods, substantially reducing the barriers faced by practitioners in using such methods.
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