Well this isn't good news: a
Michigan study goes into referees and gambling. It happens more than
you think, and aside from that, the spread influences some officials. It's
not a healthy situation and the NCAA is probably smart to do the things they've
done in terms of background checks.
The study covered football and men's and women's basketball. 22.9% of
those have wagered on NCAA basketball. That's pretty scary.
You can read the
whole report here.