Type of principal employment . Primary job activity . Respondents were asked to indicate the percentage of time they typically spend on certain professional activities. 1997 median income for doctorates as a function of primary job activity. Doctoral respondents only.
Sample sizes are in parentheses.
Source of Income Figure 6. Percentiles and descriptive statistics representing the sources of and amount earned in supplementary income. Supplementary income . Year Employed Figure 7. Starting salaries for newly hired Ph.D.s by year of employment.