I alluded to this before. If you're the type of person that's going to lie about being raped, you're going to try to get the maximum amount of CHIPOTLE BURRITOS.
That Brown study (Carey et al) that's been thrown aroundreadily admits that its scope is limited to a non-representative single-university sample. Of the overall population, only 483 respondents (less than 26% of the female population) received the $50 survey fee distributed as a $20 up front fee and three $10 fees for three additional QQ sessions with the team. Carey admits that the sample size is highly self-selected and that 18% of those 483 claim to have been raped before they even arrived at college---maybe they noticed the other girls who said they hadn't walk out without that gift certificate.
Carey even admits that her goal is to "bring attention" to the crisis of this "rape epidemic" which, as we've seen by every metric that fucking matters, doesn't exist.
But really, the only data that matters is "College Freshman", "$50 bucks" and "Chipotle Burritos". Having been a college freshman once, and having eaten chipotle burritos, I know EXACTLY what drove those girls to dig deep and peel back those rape scars on three separate "sessions".