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Depression randomized clinical trial: scatter plots of the outcome against the estimated single index z = α⊤X, for the placebo group (T = 1, in the left panel) and the drug group (T = 2, in the middle panel); the estimated treatment-specific curve (with 95% confidence bands) for each group is overlaid (the red solid curve). In the right panel, the contrast between the estimated two treatment effects (drug - placebo) as a function of the estimated single-index is displayed.
