MEANING
An outcome trend before treatment begins, examined when judging whether comparison groups followed similar prior trajectories.
Use it for
Use in causal-study reporting when examining outcome trajectories before intervention.Name the observed pattern used to assess pre-treatment comparability.
Words that belong together
- test for pre-trends
- inspect pre-treatment trends
- pre-trend coefficients
On the page
The researchers plotted each pre-trend before estimating the policy effect.
Nearby words
Opposite meanings
Word forms
- Base
- pre-trend
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Usage notes
Common in difference-in-differences work; similar pre-trends support but do not prove the parallel-trends assumption.
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