2 papers
stat.ME2024
Identification and Inference with Invalid Instruments
Hyunseung Kang, Zijian Guo, Zhonghua Liu +1
Instrumental variables (IVs) are widely used to study the causal effect of an exposure on an outcome in the presence of unmeasured confounding. IVs require an instrument, a variabl…
math.ST2016
Confidence Intervals for Causal Effects with Invalid Instruments using Two-Stage Hard Thresholding with Voting
Zijian Guo, Hyunseung Kang, T. Tony Cai +1
A major challenge in instrumental variables (IV) analysis is to find instruments that are valid, or have no direct effect on the outcome and are ignorable. Typically one is unsure…