Industry-Specific Capital and the Wage Profile: Evidence from the NLSY and the PSID

Using data from the NLSY (1979-1991) and from the Panel Study of Income Dynamics (PSID, 1981-1987), we seek to determine whether there is any net positive return to tenure with the current employer once we control for industry-specific capital. Using data from the PSID, Topel (JPE 1991) concluded that 10 years of seniority with an employer translated into a net return of about 25%. However, once we include total experience in the industry as an additional explanatory variable, the return to seniority vanishes almost completely when we use either OLS, GLS or IV-GLS estimation methods, although this conclusion varies somewhat according to the occupation, some occupation classes showing a negative net return to tenure and others showing a positive net return. Note also that this result holds whether the analysis is carried out at the 1-digit, 2-digit or 3-digit level. Therefore, it seems that what matters most for the wage profile in terms of human capital is not so much firm-specificity but industry-specificity.
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