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 jsmodule, netdiffuseR.

Depended on by CBPS, MatchThem.

Suggested by cobalt, table1.

See at CRAN