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20142022
most citedEstimating Treatment Effects using Multiple Surrogates: The Role of the Surrogate Score and the Surrogate Index

53 citations · 172 across the 26 of their papers we have counts for

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math.ST2016

Testing Endogeneity with High Dimensional Covariates

Zijian Guo, Hyunseung Kang, T. Tony Cai +1

Modern, high dimensional data has renewed investigation on instrumental variables (IV) analysis, primarily focusing on estimation of effects of endogenous variables and putting lit…

math.ST2016★ 14 cited

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…