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stat.ME2025
Nonparametric Estimation of Local Treatment Effects with Continuous Instruments
Zhenghao Zeng, Alexander W. Levis, JungHo Lee +2
Instrumental variable methods are widely used to address unmeasured confounding, yet much of the existing literature has focused on the binary instrument setting. Extensions to con…
stat.ME2024
Local Effects of Continuous Instruments without Positivity
Prabrisha Rakshit, Alexander Levis, Luke Keele
Instrumental variables are a popular study design for the estimation of treatment effects in the presence of unobserved confounders. In the canonical instrumental variables design,…
stat.ME2024
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…