Might depend on whether you mean mean or median, whether you're talking about base salary or total compensation, and a couple other factors.
I would be surprised if the difference in the average for a midwest state university versus Stanford varied significantly after controlling for labour market (i.e. people taking jobs in St Louis or Minneapolis are probably getting paid a lot less than people taking jobs in the Bay Area or Seattle).
Of course, UIUC is a "midwest state university" and it is on (or very close to) the same level as Stanford.
I would be surprised if the difference in the average for a midwest state university versus Stanford varied significantly after controlling for labour market (i.e. people taking jobs in St Louis or Minneapolis are probably getting paid a lot less than people taking jobs in the Bay Area or Seattle).
Of course, UIUC is a "midwest state university" and it is on (or very close to) the same level as Stanford.