Research Staff
Sokbae (Simon) Lee
Columbia University and IFS
Selected Publications
We develop a practical and novel method for inference on intersection bounds, namely bounds defined by […]
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This paper is concerned with developing uniform confidence bands for functions estimated nonparametrically with instrumental variables. […]
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Economic theory suggests that an extension of the maximum length of entitlement for unemployment benefits increases […]
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This paper extends the method of local instrumental variables developed by Heckman and Vytlacil (1999, 2001, […]
We propose a test of the hypothesis of stochastic monotonicity. This hypothesis is of interest in […]
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This paper presents new evidence that increases in college enrollment lead to a decline in the […]
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This paper extends the method of local instrumental variables developed by Heckman and Vytlacil (1999, 2001, […]
This paper presents a new estimator for the mixed proportional hazard model that allows for a […]
This paper presents a method for estimating a class of panel data duration models, under which […]