Difference-in-Differences Estimators of Intertemporal Treatment Effects

Clément de Chaisemartin () and Xavier d'Haultfœuille
Additional contact information
Clément de Chaisemartin: ECON - Département d'économie (Sciences Po) - Sciences Po - Sciences Po - CNRS - Centre National de la Recherche Scientifique
Xavier d'Haultfœuille: CREST - Centre de Recherche en Économie et Statistique - ENSAI - Ecole Nationale de la Statistique et de l'Analyse de l'Information [Bruz] - GENES - Groupe des Écoles Nationales d'Économie et Statistique - X - École polytechnique - IP Paris - Institut Polytechnique de Paris - ENSAE Paris - École Nationale de la Statistique et de l'Administration Économique - GENES - Groupe des Écoles Nationales d'Économie et Statistique - IP Paris - Institut Polytechnique de Paris - CNRS - Centre National de la Recherche Scientifique

Sciences Po Economics Publications (main) from HAL

Abstract: We study treatment-effect estimation using panel data. The treatment may be non-binary, non-absorbing, and the outcome may be affected by treatment lags. We make a parallel-trends assumption, and propose event-study estimators of the effect of being exposed to a weakly higher treatment dose for ℓ. periods. We also propose normalized estimators, that estimate a weighted average of the effects of the current treatment and its lags. We also analyze commonly-used two-way-fixed-effects regressions. Unlike our estimators, they can be biased in the presence of heterogeneous treatment effects. A local-projection version of those regressions is biased even with homogeneous effects.

Keywords: local projection; cost-benefit analysis; panel data; parallel trends; event-study graph; heterogeneous treatment effects; dynamic treatment effects; differences-in-differences (search for similar items in EconPapers)
Date: 2024-02-09
References: Add references at CitEc
Citations:

Published in Review of Economics and Statistics, In press, The Review of Economics and Statistics, pp.1-45. ⟨10.1162/rest_a_01414⟩

There are no downloads for this item, see the EconPapers FAQ for hints about obtaining it.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:hal:spmain:hal-05446120

DOI: 10.1162/rest_a_01414

Access Statistics for this paper

More papers in Sciences Po Economics Publications (main) from HAL
Bibliographic data for series maintained by Contact - Sciences Po Department of Economics ().