手法を比較

	機械学習拡張合成コントロール法	パネルデータ合成制御法
分野	因果推論	因果推論
系統	Regression model	Regression model
提唱年	2021	2010
提唱者	Ben-Michael, Feller & Rothstein	Alberto Abadie, Alexis Diamond & Jens Hainmueller
種類	Causal inference / quasi-experimental	Causal inference / panel data
原典	Ben-Michael, E., Feller, A., & Rothstein, J. (2021). The augmented synthetic control method. Journal of the American Statistical Association, 116(536), 1789-1803.	Abadie, A., Diamond, A., & Hainmueller, J. (2010). Synthetic Control Methods for Comparative Case Studies: Estimating the Effect of California's Tobacco Control Program. Journal of the American Statistical Association, 105(490), 493-505.
別名	ML-augmented SCM, augmented synthetic control, ASC, penalized synthetic control	SCM panel, panel synthetic control, synthetic control estimator, comparative case study
関連	5	5
概要	The machine learning-augmented synthetic control method extends the classical synthetic control estimator by using penalized regression or other ML algorithms — such as lasso, ridge, or random forests — to construct the donor weights and to model pre-treatment outcome trajectories. The augmentation corrects for residual imbalance left by the standard weighting step, yielding lower bias when no perfect synthetic control exists.	The panel data synthetic control method estimates the causal effect of an intervention on a single treated unit by constructing a data-driven weighted combination of untreated units — a synthetic control — that best reproduces the treated unit's pre-treatment outcome trajectory. The post-treatment gap between the treated unit and its synthetic counterpart is the estimated treatment effect.