title: Propensity Score Matching and Subclassification With Multi-Level Treatments.
authors.affiliation: Eli Lilly Regional Operations GmbH, Vienna, Austria.
authors.forename: Z
authors.initials: Z
authors.lastname: Kadziola
authors.affiliation: Harvard School of Public Health, Boston, MA, USA.
authors.forename: S
authors.initials: S
authors.lastname: Yang
authors.affiliation: Graduate School of Business, Stanford University, and NBER, Stanford, CA, USA.
authors.forename: G W
authors.initials: GW
authors.lastname: Imbens
authors.affiliation: Eli Lilly and Company, Indianapolis, IN, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Cui
authors.affiliation: Eli Lilly and Company, Indianapolis, IN, USA.
authors.forename: D E
authors.initials: DE
authors.lastname: Faries