Here is an interesting article:
Data measure value of a college degree
I found this point interesting as well:
"Among key findings in the College Measures report:
•Some short-term degrees command higher salaries than bachelor's degrees: In Texas, new graduates from technical associate's degree programs earned average salaries more than $11,000 higher than those for graduates with bachelor's degrees. In Colorado, graduates with associate degrees in applied sciences out-earned their counterparts with bachelor's degrees by more than $7,000 and in Virginia by more than $2,000."
I am not sure if this means the same type of bachelors degree or comparing an English major bachelor degree to a computer science AS degree.