手法を比較

	ベイズ型粗密厳密マッチング	マッチング推定量
分野	因果推論	因果推論
系統	Regression model	Regression model
提唱年	2011-2012	1973
提唱者	Iacus, King & Porro (CEM framework, 2012); Bayesian extensions by Hill and subsequent authors	Rubin (1973); large-sample theory by Abadie & Imbens (2006)
種類	Quasi-experimental matching with Bayesian inference	Nonparametric matching / causal inference
原典	Iacus, S. M., King, G., & Porro, G. (2012). Causal Inference without Balance Checking: Coarsened Exact Matching. Political Analysis, 20(1), 1-24.	Abadie, A., & Imbens, G. W. (2006). Large Sample Properties of Matching Estimators for Average Treatment Effects. Econometrica, 74(1), 235-267.
別名	Bayesian CEM, BCEM, Bayesian monotonic imbalance bounding matching	nearest-neighbor matching, NNM, matching on covariates, covariate matching
関連	6	6
概要	Bayesian Coarsened Exact Matching (Bayesian CEM) combines the coarsening-and-exact-matching framework of Iacus, King, and Porro with Bayesian posterior inference. Covariates are discretised into coarser bins so that treated and control units can be matched exactly within those bins, and Bayesian priors are then placed on the treatment-effect parameters to produce full posterior distributions over the causal estimand rather than a single point estimate.	The matching estimator identifies the causal effect of a treatment by pairing each treated unit with one or more untreated units that have similar observed characteristics. Formalised by Rubin (1973) and given rigorous large-sample theory by Abadie and Imbens (2006), it constructs a credible control group from observational data without requiring a parametric model for the outcome.