MEANING
Bias that can arise when an analysis conditions on a variable influenced by treatment, rather than only pre-treatment covariates.
Use it for
Use in causal-inference discussions of variables measured after treatment begins.Warn that conditioning on an outcome of treatment can distort a causal estimate.
Words that belong together
- introduce post-treatment bias
- condition on a post-treatment variable
- avoid post-treatment adjustment
On the page
Controlling for post-treatment employment distorted the estimated effect of the training program.
Word forms
- Base
- post-treatment bias
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Usage notes
In causal analysis, adjustment for a post-treatment variable can bias estimates; whether it does depends on the causal structure.
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