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  • James J. Heckman, Lance J. Lochner, and Petra E. Todd, "Earnings Functions and Rates of Return," NBER Working Paper 13780 (2008), https://doi.org/10.3386/w13780.

Published Versions

James J. Heckman & Lance J. Lochner & Petra E. Todd, 2008. "Earnings Functions and Rates of Return," Journal of Human Capital, University of Chicago Press, vol. 2(1), pages 1-31. citation courtesy of

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