ScholarlyCommons: Repository

Title

Matching With Doses in an Observational Study of a Media Campaign Against Drug Abuse

Author(s)

Bo Lu, University of Pennsylvania
Elaine Zanutto, University of PennsylvaniaFollow
Robert C. Hornik, University of PennsylvaniaFollow
Paul R. Rosenbaum, University of PennsylvaniaFollow

Document Type

Journal Article

Date of this Version

12-2001

Comments

Suggested Citation:
Lu, B., Zanutto, E., Hornik, R., and Rosenbaum, P. R. (2001), ‘‘MatchingWith Doses in an Observational Study of a Media Campaign Against Drug Abuse,’’ Journal of the American Statistical Association, 96, 1245–1253.

This article was originally published online at http://pubs.amstat.org/loi/jasa

Abstract

Multivariate matching with doses of treatment differs from the treatment-control matching in three ways. First, pairs must not only balance covariates, but also must differ markedly in dose. Second, any two subjects may be paired, so that the matching is nonbipartite, and different algorithms are required. Finally, a propensity score with doses must be used in place of the conventional propensity score. We illustrate multivariate matching with doses using pilot data from a media campaign against drug abuse. The media campaign is intended to change attitudes and intentions related to illegal drugs, and the evaluation compares stated intentions among ostensibly comparable teens who reported markedly different exposures to the media campaign.

Keywords

Coherent signed rank test, Equal percent bias reducing, Matching with doses, Nonbipartite matching, Observational studies, Ordinal logit model, Optimal matching, Propensity score