Propensity score methods for bias reduct
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Ralph B. D'Agostino Jr.
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Article
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1998
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John Wiley and Sons
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English
โ 154 KB
๐ 2 views
In observational studies, investigators have no control over the treatment assignment. The treated and non-treated (that is, control) groups may have large differences on their observed covariates, and these differences can lead to biased estimates of treatment effects. Even traditional covariance a