While I spent a week or two reading heavily on the (discredited) story of gang-rape at the University of Virginia, I found several interesting links.
This post, which is a decade old, discusses a study released by an internal investigative team at the U.S. Air Force.
This study, released in 2008 in the Annals of Psychotherapy, compares the same study from the Air Force to another study done by a Police department in a small Midwestern town.
Neither study is large enough to be applied to the entire United States. However, both studies provide false-allegation rates well above 20%. One mentions a diverse array of studies with false-allegation rates from 2% to 90%.
Another link: Instapundit notes the changes in rape rates as reported to the Police, since 1975. If women were less likely to report rapes in the past, then why is the reported-rate-of-rape so much higher in the 1990s than it has been since?
A final link: according to a crime-victimization survey by the US DOJ, college-age women are less likely to be raped if they are attending college than if they are not attending college.
All of these provide evidence that the usual narrative of "rape culture" does not match the reality that exists.