Match without Stratification
Not meant to be called externally. Match a data set without stratifying. Used to compare performance with and without stratification. Note that this function requires that the R package optmatch is installed.
strata_match_nstrat(object, model = NULL, k = 1)
object: a strata object
model: (optional) formula for matching. If left blank, all
columns of the analysis set in object will be used as covariates in the propensity model or mahalanobis match (except outcome, treatment and stratum)
k: the number of control individuals to be matched to each treated individual. If "k = full" is used, fullmatching is done instead of pairmatching
a named factor with matching assignments