Research Staff
Sokbae (Simon) Lee
Columbia University and IFS
Selected Publications
This paper examines the trends in geographic localization of knowledge spillovers via patent citations, considering US […]
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We show that the generalized method of moments (GMM) estimation problem in instrumental variable quantile regression […]
This paper studies inference of preference parameters in semiparametric discrete choice models when these parameters are […]
We consider a variable selection problem for the prediction of binary outcomes. We study the best […]
In a randomized control trial, the precision of an average treatment effect estimator and the power […]
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In a randomized control trial, the precision of an average treatment effect estimator and the power […]
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Economic theory often provides shape restrictions on functions of interest in applications, such as monotonicity, convexity, […]
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In a randomized control trial, the precision of an average treatment e ffect estimator can be […]
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In this paper, we propose a doubly robust method to present the heterogeneity of the average […]
Multivalued treatment models have only been studied so far under restrictive assumptions: ordered choice, or more […]