Nonparametric Preprocessing for Parametric Causal Inference

Selects matched samples of the original treated and control groups with similar covariate distributions -- can be used to match exactly on covariates, to match on propensity scores, or perform a variety of other matching procedures. The package also implements a series of recommendations offered in Ho, Imai, King, and Stuart (2007) .


Reference manual

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3.0.2 by Kosuke Imai, 3 years ago

Browse source code at

Authors: Daniel Ho [aut] , Kosuke Imai [aut, cre] , Gary King [aut] , Elizabeth Stuart [aut] , Alex Whitworth [ctb]

Documentation:   PDF Manual  

Task views: Official Statistics & Survey Methodology, Statistics for the Social Sciences

GPL (>= 2) license

Imports MASS, Matching

Suggests cem, nnet, optmatch, rpart, mgcv, WhatIf, R.rsp, testthat, rgenoud

Imported by cem, jsmodule, netdiffuseR.

Depended on by CBPS, MatchThem.

Suggested by cobalt, table1.

See at CRAN