手法を比較

	異質的処置効果逆確率重み付け（HTE-IPW）	Marginal Structural Model (MSM)
分野	因果推論	因果推論
系統	Regression model	Regression model
提唱年	2003–2015	2000
提唱者	Hirano, Imbens & Ridder; further developed by Abrevaya, Hsu & Lieli	James M. Robins, Miguel A. Hernan, Babette Brumback
種類	Causal inference / weighted regression	Causal model / semiparametric weighting
原典	Hirano, K., Imbens, G. W., & Ridder, G. (2003). Efficient estimation of average treatment effects using the estimated propensity score. Econometrica, 71(4), 1161-1189.	Robins, J. M., Hernan, M. A., & Brumback, B. (2000). Marginal structural models and causal inference in epidemiology. Epidemiology, 11(5), 550-560.
別名	HTE-IPW, CATE-IPW, heterogeneous IPW, conditional effect IPW	MSM, MSM-IPTW, marginal structural Cox model, weighted structural model
関連	5	5
概要	HTE-IPW extends standard inverse probability weighting to recover how causal effects vary across subgroups or covariate values. By reweighting each observation by the inverse of its estimated treatment probability, the method creates a pseudo-population in which treatment is independent of background characteristics, and then estimates conditional average treatment effects (CATEs) as a function of those characteristics.	A marginal structural model is a causal modeling framework designed to estimate the effect of a time-varying treatment in the presence of time-varying confounders that are themselves affected by prior treatment. By reweighting observations with inverse probability of treatment weights, MSMs create a pseudo-population in which confounding is eliminated, enabling unbiased estimation of causal treatment contrasts even when standard regression adjustments would fail.