I was doing a little research on teacher pay and came across the Illinois Board of Higher Education site, which lists the compensation of all professors and many administrators. With is in hand, I through it into Tableau and profiled Illinois State University (ISU.)
ISU is top heavy. It pays the administrators and unit directors more than other institutions. They also tend to pay their professors and adjuncts less than most other institutions.
ISU also uses many more atypical (likely adjunct) teachers. There are almost twice as many part time instructors than other public universities. This is likely because it is a teaching college as well as having a vocational/technical bent. Bringing in people with real world experience can improve learning. It is also why the pay for instructors/lecturers’ pay is low.
Excluding the lower paid people, the mix is fairly typical with a few more associate professors on average. With instructors removed, the median salary is $80,700 vs other universities $83,400.
When looking at a Pareto chart of compensation, there is a budge of low paid instructors with compensation in the $10 to $30K range. There is another bulge around $80 to 120K.
Overall, the administrators and high positioned people at ISU are well paid compared to other universities. It also relies on part-time and adjuncts more than others.
Want to play with the data and compare it to other schools? Go here: 2016 ISU Professor Pay Visualization.