52. マッチングによる因果効果の推定
## パッケージの読み込み
library(Matching)
nsw1 <- Match(Y = nsw.data$re78, Tr = nsw.data$treat, X = logit$fitted)
summary(nsw1)
……(略)……
Estimate... 1866.4
AI SE...... 1562.3
T-stat..... 1.1947
p.val...... 0.23222
Original number of observations.......................... 313
Original number of treated obs............................ 185
Matched number of observations........................ 185
Matched number of observations (unweighted). 202
NSWプログラムの効果
62. ・Austin PC (2011) An Introduction to Propensity
Score Methods for Reducing the Effects of
Confounding in Observational Studies.
・Stuart EA (2010) Matching Methods for Causal
Inference: A Review and a Look Forward.
・Sekhon JA (2011) Multivariate and Propensity Score
Matching Software with Automated Balance
Optimization: The Matching Package for R.
参考資料(論文)