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mediation: R Package for Causal Mediation Analysis

JSSJ ournal of Statistical SoftwareAugust 2014, Volume 59, Issue :RPackage for Causal Mediation AnalysisDustin TingleyHarvard UniversityTeppei YamamotoMassachusetts Instituteof TechnologyKentaro HirosePrinceton UniversityLuke KeelePennsylvania State UniversityKosuke ImaiPrinceton UniversityAbstractIn this paper, we describe theRpackagemediationfor conducting Causal mediationanalysis in applied empirical research. In many scientific disciplines, the goal of researchersis not only estimating Causal effects of a treatment but also understanding the processin which the treatment causally affects the outcome. Causal Mediation Analysis is fre-quently used to assess potential Causal mechanisms. Themediationpackage implementsa comprehensive suite of statistical tools for conducting such an Analysis . The packageis organized into two distinct approaches.

Our estimation strategy overcomes the limitation of the standard methods based on the product or di erence of coe cients, which are only appropriate for the analysis of causal. 2 Causal Mediation Analysis. Causal Mediation Analysis. 5 Causal Mediation Analysis ) E( . The

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