@misc{Leuven2003,
author = {Leuven, E. and Sianesi, B.},
title= {PSMATCH2: Stata module to perform full Mahalanobis and propensity score matching, common support graphing, and covariate imbalance testing},
year = {2003},
URL = {http://ideas.repec.org/c/boc/bocode/s432001.html},
publisher = {Boston College Department of Economics},
}