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| 多期間マッチング推定量× | 差分の差 (Difference-in-Differences, DiD)× | |
|---|---|---|
| 分野≠ | 因果推論 | 計量経済学 |
| 系統 | Regression model | Regression model |
| 提唱年≠ | 2005 | 1994 |
| 提唱者≠ | Abadie (2005); Imbens & Wooldridge (2009) | Card & Krueger (canonical 1994 application); Angrist & Pischke (textbook treatment) |
| 種類≠ | Quasi-experimental / causal inference | Causal inference / panel regression |
| 原典≠ | Abadie, A. (2005). Semiparametric Difference-in-Differences Estimators. Review of Economic Studies, 72(1), 1-19. DOI ↗ | Angrist, J. D., & Pischke, J.-S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355 |
| 別名≠ | panel matching estimator, longitudinal matching, multi-wave matching, repeated-cross-section matching | diff-in-diff, DiD, Farkların Farkı (Diff-in-Diff) |
| 関連≠ | 6 | 5 |
| 概要≠ | The multi-period matching estimator extends the standard matching framework to settings with multiple time periods, pairing each treated unit to similar untreated units based on pre-treatment covariates or propensity scores, then using within-pair before-after differences to estimate the average treatment effect on the treated (ATT). Leveraging repeated observations, it simultaneously controls for observed confounders and time-invariant unobserved heterogeneity. | Difference-in-Differences is a causal-inference method that estimates the effect of an intervention by comparing how a treatment group and a control group change over time. Made famous by Card and Krueger's 1994 minimum-wage study and developed in Angrist and Pischke's Mostly Harmless Econometrics, it isolates the treatment effect as the difference between the two groups' before-after changes. |
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