5 citations · 8 across the 3 of their papers we have counts for
3 papers
Nonparametric identification and efficient estimation of causal effects with instrumental variables
Alexander W. Levis, Edward H. Kennedy, Luke Keele
Instrumental variables are widely used in econometrics and epidemiology for identifying and estimating causal effects when an exposure of interest is confounded by unmeasured facto…
Efficient estimation of subgroup treatment effects using multi-source data
Guanbo Wang, Alexander Levis, Jon Steingrimsson +1
Investigators often use multi-source data (e.g., multi-center trials, meta-analyses of randomized trials, pooled analyses of observational cohorts) to learn about the effects of in…
Doubly robust machine learning for an instrumental variable study of surgical care for cholecystitis
Kenta Takatsu, Alexander W. Levis, Edward Kennedy +2
Comparative effectiveness research frequently employs the instrumental variable design since randomized trials can be infeasible for many reasons. In this study, we investigate and…