April 15, 2015 . .
Propensity scores are increasingly in vogue as a way to adjust for differences between populations in estimating treatment effects. Some view propensity scores as an almost mythical way of dealing with confounding. However, they are limited to adjustment for the observables, just like standard regression. So it raises the question "how do propensity scores compare as an estimator relative to linear regression?" The answer is short --- "not well."
statistics r regression propensity-scores