has been extended in several directions, including two-stage estimation and so-called G-estimation in nonlinear (e. g … new instrumental variable methods. We briefly review the theory of two-stage estimation and G-estimation, and illustrate …

analyses are biased due to unmeasured confounding. The instrumental variables (IV; Angrist et al., 1996) and G-estimation … biased in the presence of unmeasured confounding. Therefore, we consider the G-estimation approach as an alternative solution …

This article describes the stgest command, which implements G-estimation (as proposed by Robins) to estimate the effect …

effect for longitudinal studies, (iii) describe several methods -- based on inverse probability weighting and g-estimation …