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  "Title": "Causal Mediation Analysis in Multisite Trials",
  "Author": "Xu Qin, Guanglei Hong",
  "Maintainer": "Xu Qin <xuqin@uchicago.edu>",
  "Description": "We implement multisite causal mediation analysis using the\nmethods proposed by Qin and Hong (in press). It enables causal\nmediation analysis in multisite trials, in which individuals\nare assigned to a treatment or a control group at each site. It\nallows for estimation and hypothesis testing for not only the\npopulation average but also the between-site variance of direct\nand indirect effects. This strategy conveniently relaxes the\nassumption of no treatment-by-mediator interaction while\ngreatly simplifying the outcome model specification without\ninvoking strong distributional assumptions.",
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