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Unconfoundedness, overlap, and what data can check

The questions ask you to state what a study assumes and to say which part of it the data could speak to, rather than to recall a definition. The two assumptions are easy to name and easy to conflate, and the difference between them is what decides whether a balance table means anything.

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What this covers

  • Judge whether an observational comparison identifies an effect

    Given an observational study, the learner can state the assumptions adjustment requires, judge which of them the data can speak to, and say what the comparison would estimate if an assumption failed.

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