Why Do Wage Profiles Slope Upwards? Tests of the General Human Capital Model

David Neumark and Paul Taubman

No 4688, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: This paper tests some empirical implications of the general human capital model's explanation of rising wage profiles. At the individual level, the model implies that there will be a negative relationship between the initial wage level and wage growth of young, inexperienced workers. At the market level, the model implies that the present value of the wage profile of an investor equals that of an otherwise identical non-investor, or that the ratio of the present values equals one. We test both of these hypotheses. Evidence on the wage level-wage growth tradeoff points to a negative relationship between initial wage levels and wage growth, even after correcting for negative biases that may have influenced existing estimates of this relationship. Evidence on present values of wage profiles suggests that the ratio of the present value of rising wage profiles to flat wage profiles is quite close to one. Alternative estimates of this ratio are tightly clustered around one, and more often than not are insignificantly different from one. Overall, then, the evidence is largely consistent with the general human capital model.

Date: 1994-03
Note: LS
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Published as Journal of Labor Economics, Vol. 13, no. 4 (1995): pp. 736-761.

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