International Fellows
Sokbae (Simon) Lee
Columbia University and IFS
Selected Publications
Studies have shown a decreasing trend in the U.S. gender earnings gap since the 1980s. The […]
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In this article, we develop a general method for testing threshold effects in regression models, using […]
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We develop a practical and novel method for inference on intersection bounds, namely bounds defined by […]
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This paper presents new evidence that increases in college enrollment lead to a decline in the […]
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We examine the “home bias” of knowledge spillovers (the idea that knowledge spreads more slowly over […]
In parametric models a sufficient condition for local identification is that the vector of moment conditions […]
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This paper develops tests for inequality constraints of nonparametric regression functions. The test statistics involve a […]
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Blau and Kahn (JOLE, 1997; ILRR, 2006) decomposed trends in the U.S. gender earnings gap into […]
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This paper develops a concrete formula for the asymptotic distribution of two-step, possibly non-smooth semiparametric M-estimators […]
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In this article, we develop a general method for testing threshold effects in regression models, using […]