8.9 Using paths to test the DAG
- List all of the paths between A and B.
- Consider only the open paths.
- Do what you need to do to make sure they’re all Closed.
- If A and B are still related to each other (placebo test), that means there must be some other path you didn’t account for.
Interpretation of placebo tests:
- We have a model, so not accounting for all effects is okay.
- small but nonzero relationship: fine
- enormous and super-strong relationship: 😱