multilevelMatching implements the estimators introduced in Yang et al. (2016) Propensity Score Matching and Subclassification in Observational studies with Multi-level Treatments: https://doi.org/10.1111/biom.12505. These are covariate- and propensity score-matching estimators for estimating the causal effect of multilevel treatment (i.e., 3 or more treatment types).
The main function for estimation via matching on covariates or propensity
multiMatch. To carry out estimation via
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