All three measures of hourly wage inequality from the CPS MORG display large increases in the first part of the 1980s, but in contrast to the March CPS FTFY series, residual inequality stopped growing after the mid-1980s for hourly wages in the CPS MORG.
We use the Integrated Public Use Micro-samples from the 1940-70 decennial censuses (Census IPUMS) to extend our March CPS series on overall male FTFY weekly wage inequality (from the top panel of figure 2) back to 1939.
Perhaps surprisingly, this is true even when the IPEDS graduation rate, which includes only FTFY students, is the dependent variable.
Increasing the percentage of students who receive financial aid is positive and significant when IPEDS graduation rates for FTFY students are used.
It is not clear why a higher percentage of students enrolled in degree programs would have any impact on the FTFY IPEDS graduation rate, yet the findings indicate a negative influence.
The gaps for women are similar whether the data are confined to FTFY
workers or not while the gaps for men are slightly different between FTFY
workers and all workers, at least in the early 1980s.
The smoothed trend lines are clearly different, however, with the FTFY workers in both the CPS and LSY79 samples now showing a weak positive trend.
Excluding the self-employed, the pattern obtained is basically the same as that of the full sample of FTFY workers: in the final specification of model C, both samples again show a positive trend of similar magnitude in earnings dispersion over time.
To examine the latter, chart 4 shows the trends in earnings dispersion by age-year cell separately for and non-FTFY workers.(11) The trends for FTFY workers look similar for the two samples--that is, both groups show a modest upward trend.
In addition, for each gender, two different samples are used: all workers, including part-time and part-year workers (ALL); and only full-time, full-year workers (FTFY).
At the one-digit industry level, interindustry wage differentials among FTFY women run from a high of 0.26 (public utilities) to a low of -0.19 (retail trade), a range of 0.45.
Industry Dummy Variables Sample 1-digit 2-digit 3-digit ALL 0.95 0.90 FTFY 0.89 0.88 ALLSM 0.83 FTFYSM 0.79 (a) Regression results are based on equation (1) in the text, estimated on the basis of the March 1988 Current Population survey.