SelectionBias - Calculates Bounds for the Selection Bias for Binary Treatment and Outcome Variables

Computes bounds and sensitivity parameters as part of sensitivity analysis for selection bias. Different bounds are provided: the SV (Smith and VanderWeele), AF (assumption-free) bound, GAF (generalized AF), and CAF (counterfactual AF) bounds. The calculation of the sensitivity parameters for the SV and GAF bounds assume an additional dependence structure in form of a generalized M-structure. The bounds can be calculated for any structure as long as the necessary assumptions hold. See Smith and VanderWeele (2019) <doi:10.1097/EDE.0000000000001032>, Zetterstrom and Waernbaum (2022) <doi:10.1515/em-2022-0108> and Zetterstrom (2024) <doi:10.1515/em-2023-0033>.