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Difference-in-Differences in the Marketplace
Minton, Robert; Mulligan, Casey B. - National Bureau of Economic Research - 2024
Price theory says that the most important effects of policy and technological change are often found beyond their first …'s outcomes. This paper uses the industry model from price theory to represent the statistical concepts of treatments and controls … between them, and how they correspond to the scale and substitution effects emphasized in price theory …
Persistent link: https://www.econbiz.de/10014486203
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Difference-in-Differences with Unequal Baseline Treatment Status
Tazhitdinova, Alisa; Vazquez-Bare, Gonzalo - National Bureau of Economic Research - 2023
We study a difference-in-differences (DiD) framework where groups experience unequal treatment statuses in the pre-policy change period. This approach is commonly employed in empirical studies but it contradicts the canonical model's assumptions. We show that in such settings, the standard DiD...
Persistent link: https://www.econbiz.de/10014247985
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The Augmented Synthetic Control Method
Ben-Michael, Eli; Feller, Avi; Rothstein, Jesse - National Bureau of Economic Research - 2021
panel data settings. The "synthetic control" is a weighted average of control units that balances the treated unit's pre …
Persistent link: https://www.econbiz.de/10012585369
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Two-way Fixed Effects and Differences-in-Differences Estimators with Several Treatments
Chaisemartin, Clément de; D'Haultfœuille, Xavier - National Bureau of Economic Research - 2022
We study regressions with period and group fixed effects and several treatment variables. Under a parallel trends assumption, the coefficient on each treatment identifies the sum of two terms. The first term is a weighted sum of the effect of that treatment in each group and period, with weights...
Persistent link: https://www.econbiz.de/10012938703
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Trauma at School : The Impacts of Shootings on Students' Human Capital and Economic Outcomes
Cabral, Marika - 2020
A growing number of American children are exposed to gun violence at their schools, but little is known about the impacts of this exposure on their human capital attainment and economic well-being. This paper studies the causal effects of exposure to shootings at schools on children's...
Persistent link: https://www.econbiz.de/10012482529
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Two-way Fixed Effects and Differences-in-Differences Estimators with Several Treatments
Chaisemartin, Clément de; D'Haultfœuille, Xavier - National Bureau of Economic Research - 2022
We study two-way-fixed-effects regressions (TWFE) with several treatment variables. Under a parallel trends assumption, we show that the coefficient on each treatment identifies a weighted sum of that treatment's effect, with possibly negative weights, plus a weighted sum of the effects of the...
Persistent link: https://www.econbiz.de/10013435126
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Designing Difference in Difference Studies With Staggered Treatment Adoption : Key Concepts and Practical Guidelines
Freedman, Seth; Hollingsworth, Alex; Simon, Kosali … - National Bureau of Economic Research - 2023
Difference-in-Difference (DID) estimators are a valuable method for identifying causal effects in the public health researcher's toolkit. A growing methods literature points out potential problems with DID estimators when treatment is staggered in adoption and varies with time. Despite this, no...
Persistent link: https://www.econbiz.de/10014436973
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Stacked Difference-in-Differences
Wing, Coady; Freedman, Seth; Hollingsworth, Alex - National Bureau of Economic Research - 2024
This paper introduces the concept of a "trimmed aggregate ATT," which is a weighted average of a set of group-time average treatment effect on the treated (ATT) parameters identified in a staggered adoption difference-in-differences (DID) design. The set of identified group-time ATTs that...
Persistent link: https://www.econbiz.de/10014468254
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Difference-in-differences with a Continuous Treatment
Callaway, Brantly; Goodman-Bacon, Andrew; Sant'Anna, … - National Bureau of Economic Research - 2024
This paper analyzes difference-in-differences designs with a continuous treatment. We show that treatment effect on the treated-type parameters can be identified under a generalized parallel trends assumption that is similar to the binary treatment setup. However, interpreting differences in...
Persistent link: https://www.econbiz.de/10014486209
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Difference-in-Differences Estimators of Intertemporal Treatment Effects
Chaisemartin, Clément de; D'Haultfœuille, Xavier - National Bureau of Economic Research - 2022
We study treatment-effect estimation, with a panel where groups may experience multiple changes of their treatment dose …
Persistent link: https://www.econbiz.de/10013172172