Van Huellen, Sophie; Qin, Duo - In: Econometrics : open access journal 7 (2019) 3/36, pp. 1-20
This paper re-examines the instrumental variable (IV) approach to estimating returns to education by use of compulsory school law (CSL) in the US. We show that the IV-approach amounts to a change in model specification by changing the causal status of the variable of interest. From this...