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  "Description": "When plotting treated-minus-control differences,\nafter-minus-before changes, or difference-in-differences, the\nttrans() function symmetrically transforms the positive and\nnegative tails to aid plotting.  The package includes an\nobservational study with three control groups and an unaffected\noutcome; see Rosenbaum (2022)\n<doi:10.1080/00031305.2022.2063944>.",
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      "title": "Alcohol and HDL Cholesterol: An Observational Study with 3 Control Groups",
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        "tailTransform-package",
        "tailTransform"
      ]
    },
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      "title": "Alcohol and HDL Cholesterol: An Observational Study with 3 Control Groups",
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        "Observational study",
        "Causal inference",
        "Multiple control groups",
        "Unaffected outcome",
        "Placebo outcome",
        "Negative control"
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        "Matched pair difference",
        "Transformation"
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        "Matched pair difference",
        "Transformation"
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        "Transformation"
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      "page": "ttrans",
      "title": "Symmetric Tail Transformation of Differences for Graphical Display",
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        "transformation",
        "pair differences",
        "difference-in-differences"
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