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Years and Intensity of Schooling Investing

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Arleen Leibowitz
Abstract

An essential feature of schooling is not only that it occurs in a different site than most on-the-job training but also that it is more intensive. That is, a smaller proportion of gross potential earnings is sacrificed in on-the-job training than in schooling. In estimating human capital earnings functions it has generally been assumed that during schooling 100% of gross potential earnings are invested in all years, while in on-the-job training this percentage is smaller and is a declining function of age. This assumption has been quite useful since it allows the identification of an estimate of the rate of return on schooling from a regression of earnings on years of schooling. This paper argues that the percentage of gross earnings invested may fall below 100% well before schooling is ended, that this percentage is likely to be correlated with years of schooling, and thus this procedure yields only a biased estimate of the rate of return to schooling.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 0049.

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Date of creation: Aug 1974
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Handle: RePEc:nbr:nberwo:0049

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  1. Griliches, Zvi & Mason, William M, 1972. "Education, Income, and Ability," Journal of Political Economy, University of Chicago Press, vol. 80(3), pages S74-S103, Part II, . [Downloadable!] (restricted)
  2. Mincer, Jacob & Polachek, Solomon, 1974. "Family Investment in Human Capital: Earnings of Women," Journal of Political Economy, University of Chicago Press, vol. 82(2), pages S76-S108, Part II, . [Downloadable!] (restricted)
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  3. Lewis C. Solmon, 1973. "The Definition and Impact of College Quality," NBER Working Papers 0007, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  4. Jacob Mincer & Solomon Polacheck, 1974. "Family Investments in Human Capital: Earnings of Women," NBER Chapters, in: Economics of the Family: Marriage, Children, and Human Capital, pages 397-431 National Bureau of Economic Research, Inc. [Downloadable!]
  5. Johnson, Thomas, 1970. "Returns from Investment in Human Capital," American Economic Review, American Economic Association, vol. 60(4), pages 546-60, September. [Downloadable!] (restricted)
  6. Hause, John C, 1972. "Earnings Profile: Ability and Schooling," Journal of Political Economy, University of Chicago Press, vol. 80(3), pages S108-S38, Part II, . [Downloadable!] (restricted)
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