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Direct linkHaviland, Amelia; Nagin, Daniel S.; Rosenbaum, Paul R. – Psychological Methods, 2007
In a nonrandomized or observational study, propensity scores may be used to balance observed covariates and trajectory groups may be used to control baseline or pretreatment measures of outcome. The trajectory groups also aid in characterizing classes of subjects for whom no good matches are available and to define substantively interesting groups…
Descriptors: Males, Observation, Control Groups, Matched Groups
