Data originally from Card, D. 1995. Using geographic variation in college proximity to estimate the return to schooling. In Aspects of Labour Market Behaviour: Essays in Honour of John Varderkamp, edited by L. Christofides, E. K. Grant, and R. Swidinsky, 201–222. Toronto: University of Toronto Press.
Source: Data from the supplemental appendix of Słoczyński, T., S. D. Uysal, and J. M. Wooldridge. 2025. Abadie's kappa and weighting estimators of the local average treatment effect. Journal of Business & Economic Statistics 43: 164–177. https://doi.org/10.1080/07350015.2024.2332763.