Estimating and Interpreting Models With Endogenous Treatment Effects
比较了工具变量法和控制函数法在估计内生处理效应时的关系，发现两者紧密相关，并探讨了它们对经济排序行为的影响。
This article examines the relationship between two alternative approaches, instrumental variables and control function procedures, for estimating the impact of endogenous treatment effects. Although it is well known that the two approaches generate comparable estimates, the relationship between the estimators and their accompanying endogeneity tests appears not to be well understood. We show that the two procedures are closely related. We also examine the implications of the two procedures for the underlying economic sorting behavior.