TY  - BOOK
AU  - Dube,Arindrajit
AU  - Girardi,Daniele
AU  - Jordà,Òscar
AU  - Taylor,Alan M.
ED  - National Bureau of Economic Research.
TI  - A Local Projections Approach to Difference-in-Differences Event Studies
T2  - NBER working paper series
PY  - 2023///
CY  - Cambridge, Mass.
PB  - National Bureau of Economic Research
KW  - Econometric and Statistical Methods and Methodology:  General
KW  - jelc
KW  - Panel Data Models • Spatio-temporal Models
KW  - Econometric Modeling
N1  - April 2023; Hardcopy version available to institutional subscribers
N2  - We propose a local projection (LP) based difference-in-differences approach that subsumes many of the recent solutions proposed in the literature to address possible biases arising from negative weighting. We combine LPs with a flexible 'clean control' condition to define appropriate sets of treated and control units. Our proposed LP-DiD estimator can be implemented with various weighting and normalization schemes for different target estimands, accommodates controls for pre-treatment values of the outcome and of other time-varying covariates, and is simple and fast to implement. Simulations and two empirical applications demonstrate that the LP-DiD estimator performs well in common applied settings
UR  - https://www.nber.org/papers/w31184
UR  - http://dx.doi.org/10.3386/w31184
ER  -