Figure C1:

Individual probabilities of response versus potential outcomes at the end of the first stage of a SMART under response models R₊ and R₋. Based on a simulated SMART with n = 500 individuals; a₁ = 1 was chosen arbitrarily and without loss of generality. Empirical average response rate is plotted as a horizontal line in gray. Darker regions of the curve contain more observations.

(I) Response probabilities in the R₊ model versus (II) Response probabilities in the R₋ model versus $Y_{1,i}^{(1)}$ with average response rate r₁ = 0.4. Higher val- $Y_{1,i}^{(1)}$ with average response rate r₁ = 0.6. Higher values of $Y_{1,i}^{(1)}$ are associated with higher response prob- ues of $Y_{1,i}^{(1)}$ are associated with lower response prob- ues of $Y_{1,i}^{(1)}$ are associated with lower response probabilities.