186 citations · 199 across the 7 of their papers we have counts for
7 papers
Weak Identification with Many Instruments
Anna Mikusheva, Liyang Sun
Linear instrumental variable regressions are widely used to estimate causal effects. Many instruments arise from the use of ``technical'' instruments and more recently from the emp…
Adapting to Misspecification
Timothy B. Armstrong, Patrick Kline, Liyang Sun
Empirical research typically involves a robustness-efficiency tradeoff. A researcher seeking to estimate a scalar parameter can invoke strong assumptions to motivate a restricted e…
Empirical Welfare Maximization with Constraints
Liyang Sun
Empirical Welfare Maximization (EWM) is a framework that can be used to select welfare program eligibility policies based on data. This paper extends EWM by allowing for uncertaint…
Inference with Many Weak Instruments
Anna Mikusheva, Liyang Sun
We develop a concept of weak identification in linear IV models in which the number of instruments can grow at the same rate or slower than the sample size. We propose a jackknifed…
Double Robustness for Complier Parameters and a Semiparametric Test for Complier Characteristics
Rahul Singh, Liyang Sun
We propose a semiparametric test to evaluate (i) whether different instruments induce subpopulations of compliers with the same observable characteristics on average, and (ii) whet…
Estimating Dynamic Treatment Effects in Event Studies with Heterogeneous Treatment Effects
Liyang Sun, Sarah Abraham
To estimate the dynamic effects of an absorbing treatment, researchers often use two-way fixed effects regressions that include leads and lags of the treatment. We show that in set…
Multipath IP Routing on End Devices: Motivation, Design, and Performance
Liyang Sun, Guibin Tian, Guanyu Zhu +3
Most end devices are now equipped with multiple network interfaces. Applications can exploit all available interfaces and benefit from multipath transmission. Recently Multipath TC…