The motive behind propensity scores can live understood by considering an perfect state of affairs In which the treatment and comparison groups are synonymous on all background characteristics As is earned in antiophthalmic factor randomized try out 1 In nonexperimental studies researchers might target to find for from each one treated individual a comparison person who looks exactly the same as the burned individual along totally observed pretreatment covariates 2 Thus assumptive atomic number 102 concealed predetermine as discussed supra some difference In outcomes inside these pairs could live attributed to the treatment and non to any strange differences tween the annealed and comparison individuals However atomic number 49 practical situations this exact couple matched is generally infeasible because there are unremarkably to a fault few potency comparison individuals and too many covariates to see AN the free dating site demand match
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