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Pre-event Trends in the Panel Event-study Design / Simon Freyaldenhoven, Christian Hansen, Jesse M. Shapiro.
- Format:
- Book
- Author/Creator:
- Freyaldenhoven, Simon.
- Series:
- Working Paper Series (National Bureau of Economic Research) no. w24565.
- NBER working paper series no. w24565
- Language:
- English
- Physical Description:
- 1 online resource: illustrations (black and white);
- Place of Publication:
- Cambridge, Mass. National Bureau of Economic Research 2018.
- Summary:
- We consider a linear panel event-study design in which unobserved confounds may be related both to the outcome and to the policy variable of interest. We provide sufficient conditions to identify the causal effect of the policy by exploiting covariates related to the policy only through the confounds. Our model implies a set of moment equations that are linear in parameters. The effect of the policy can be estimated by 2SLS, and causal inference is valid even when endogeneity leads to pre-event trends ("pre-trends") in the outcome. Alternative approaches perform poorly in our simulations.
- Notes:
- Print version record
- April 2018.
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