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Unformatted text preview: effects. Selective loss of data Variety of effects depending on the mechanism of data loss. Ascertainment bias Treatment effect is brought more into alignment with prior expectation Retroactive definitions Strong anticonservative bias is possible. Uncontrolled covariate Confounding of treatment effect with covariate effect....
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This note was uploaded on 12/30/2010 for the course BST 252 taught by Professor Tsodikov during the Winter '06 term at UC Davis.
- Winter '06