手法を比較

	パネルデータエントロピー平衝法	パネルデータ傾向スコアマッチング
分野	因果推論	因果推論
系統	Regression model	Regression model
提唱年	2012 (cross-section); panel adaptation mid-2010s onward	1997-1998
提唱者	Hainmueller (2012); extended to panel settings by subsequent applied econometric work	Heckman, Ichimura & Todd
種類	Covariate balancing / reweighting estimator	Matching / causal inference
原典	Hainmueller, J. (2012). Entropy Balancing for Causal Effects: A Multivariate Reweighting Method to Produce Balanced Samples in Observational Studies. Political Analysis, 20(1), 25-46.	Heckman, J. J., Ichimura, H., & Todd, P. (1998). Matching as an Econometric Evaluation Estimator. Review of Economic Studies, 65(2), 261-294.
別名	EB-panel, panel entropy balancing, entropy reweighting in panel data, panel-EB	PSM with panel data, longitudinal PSM, panel PSM, difference-in-differences PSM
関連	5	6
概要	Panel data entropy balancing extends Hainmueller's (2012) entropy balancing method to longitudinal settings. It computes unit-level weights for control observations so that their covariate moments exactly match those of the treatment group across panel periods, then plugs these weights into a weighted panel regression to estimate causal treatment effects without requiring a correctly specified propensity score model.	Panel data propensity score matching combines the bias-reduction of PSM with the longitudinal structure of panel data, enabling causal estimation of treatment effects by matching treated and control units on observable pre-treatment characteristics and then differencing within matched pairs over time. Developed in the framework of Heckman, Ichimura, and Todd (1998), it is especially valuable when randomisation is infeasible and both selection on observables and time-varying confounding must be addressed simultaneously.