手法を比較

	教育研究におけるパネルイベントスタディ	パネルデータ差分の差分法（Panel DiD / TWFE）
分野	因果推論	因果推論
系統	Regression model	Regression model
提唱年	1993 (general method); 2000s (education applications)	1985–2004
提唱者	Jacobson, LaLonde & Sullivan (1993); widely adopted in education economics from 2000s onward	Ashenfelter & Card (1985); codified by Angrist & Pischke (2009); serial correlation critique by Bertrand, Duflo & Mullainathan (2004)
種類	Causal inference / panel regression	Causal inference / panel regression
原典	Jacobson, L. S., LaLonde, R. J., & Sullivan, D. G. (1993). Earnings Losses of Displaced Workers. American Economic Review, 83(4), 685-709.	Angrist, J. D., & Pischke, J.-S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355
別名	education event study, panel event-study design, education policy event study, school event study	Two-Way Fixed Effects DiD, TWFE, Panel DiD, Panel Diff-in-Diff
関連	4	4
概要	The panel event study is a causal-inference design that tracks outcomes for a panel of educational units — students, teachers, schools, or districts — across relative time periods around a well-defined event such as a policy change, school reform, or staffing transition. By estimating period-by-period treatment effects, it reveals not only whether an intervention mattered but also when effects appeared and how long they persisted, making it especially valued in education economics.	Panel Data Difference-in-Differences extends the classic two-period DiD design to settings with multiple units observed across many time periods. By absorbing unit-level fixed effects and time fixed effects simultaneously, it isolates the causal effect of a treatment or policy change while controlling for both time-invariant unit heterogeneity and common time shocks affecting all units.