The total number of employees U.S. higher education rose 25% from 2000 to 2012--but the nubmer fo students in higher education increased, too. Thus, when looking at employees in higher education, it is most useful to adjust for the number of students. This figure shows that among public institutions, the number of employees per 1,000 students has been flat or declining since 2000. For private institutions, which tend to have greater financial resources, it has been rising. Research institutions have more employees, because running the administrative apparatus requires them.
But within these overall employee numbers, a shift is occurring. This figure shows changes in different categories of employees over time just for research universities, again expressed per 1,000 full-time equivalent students.
Overall, full time faculty are about 20-25% of the employees in higher education, with the number being a little lower in research-oriented institutions and higher in teaching-oriented institution. The number of faculty relative to the number of students (the blue line) has barely budged in the public research universities, and has risen in the private ones. But even among full-time faculty, the share with a time-limited contract instead of a conventional tenure arrangement is declining: "Among full-time faculty only, the share of non-tenure-track professors increased about 3 percentage points between 2004 and 2012. By 2012, these non-tenure track positions represented more than one third of assistant professors, 18 percent of associate professors, and 12 percent of full professors ..."
Part-time faculty, shown by the purple line in the earlier figure, have risen. Again, looking at faculty per 1,000 students, the number of full-time faculty has risen only at private research universities. In other types of institutions, the number of full-time faculty has either stayed constant with the number of students or dropped--while the share of part-timers per student has risen among all institutions.
The number of professional staff per student has risen substantially, as shown by the orange line above. The study offers this definition: "Professional (support and service): Positions that provide student services, academic, or professional support and generally require a bachelor’s degree. Examples include business/financial analysts, human resources staff, computer administrators, counselors, lawyers, librarians, athletic staff, and health workers."
In both types of research universities, the number of "nonprofessional" staff--technical, clerical, service/maintenance--has fallen relative to the number of students. This group is about one-quarter of the employees at higher education institutions. What has actually happened here is the total number of these employees hasn't changed much, but they are serving a larger number of students over time--probably due in part to the information technology revolution.
The picture that emerges from all this is fairly clear. When it comes to employment, colleges and universities have tried to hold down faculty costs in dealing with the expanding numbers of students by the use of time-contract faculty and part-timers. The nonprofessional staff are dealing with the increased number of students by using improved information technology and other capital investments, without a need for a higher total number of staff. But the number of professional staff is rising, both in absolute terms and relative to the number of students. Desrochers and Kirshstein report these patterns in a neutral tone: "Growing numbers of administrative positions (executive and professional) and
changes in faculty composition represent long-standing trends. The shifting balance among these positions has played out steadily over time in favor of administrators, and it is unclear when a tipping point may be near. Whether this administrative growth constitutes unnecessary “bloat” or is justified as part of the complexities involved in running a modern-day university remains up for debate."
I'll only add that institutions are defined by their people. As the full-time and tenured faculty become a smaller share of the employees of the institution and the professional administrators become a larger share, the nature and character of the institution inevitably changes. In this case, colleges and universities have become less about faculty, teaching, and research, and more about the provision of professional services to students and faculty. As far as I know, this shift was not planned or chosen, and the costs and benefits of such a shift were not analyzed in advance. It just happened.