MEANING
A design that estimates how outcomes change at different times relative to treatment, often to examine dynamics and pre-treatment trends.
Use it for
Effects are traced across periods before and after treatment.Describe an analysis that estimates the timing and development of effects around an intervention.
Words that belong together
- event-study design
- event-time coefficients
- pre-treatment trend
On the page
The event-study design showed larger declines after the policy took effect, but little movement beforehand.
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Word forms
- Base
- event-study design
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Usage notes
In difference-in-differences work, pre-treatment coefficients can diagnose trend patterns but do not by themselves prove parallel trends.
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