手法を比較

	パネルデータ逆確率重み付け	Marginal Structural Model (MSM)
分野	因果推論	因果推論
系統	Regression model	Regression model
提唱年	2000	2000
提唱者	Robins, Hernan & Brumback	James M. Robins, Miguel A. Hernan, Babette Brumback
種類	Reweighting / causal inference	Causal model / semiparametric weighting
原典	Robins, J. M., Hernan, M. A., & Brumback, B. (2000). Marginal structural models and causal inference in epidemiology. Epidemiology, 11(5), 550-560.	Robins, J. M., Hernan, M. A., & Brumback, B. (2000). Marginal structural models and causal inference in epidemiology. Epidemiology, 11(5), 550-560.
別名	panel IPW, longitudinal IPW, time-varying IPW, panel IPTW	MSM, MSM-IPTW, marginal structural Cox model, weighted structural model
関連	5	5
概要	Panel Data Inverse Probability Weighting (panel IPW) estimates the causal effect of a time-varying treatment by reweighting observed units to create a pseudo-population in which treatment is independent of measured confounders at each time point. It extends the cross-sectional IPW framework to longitudinal settings where treatment status and confounders both evolve across multiple periods.	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.