Matching with R

An introduction to matching, such as propensity score matching, using R’s “optmatch” package. Matching can be used to try and improve covariate balance between treatment and intervention group in observational studies. We will discuss the theory behind matching and propensity scores, followed by examples using R to perform the matching and judging the match quality, as well as speeding up the matching operation. Familiarity with R will be assumed.