There is no way to know how many fake rape allegations there are. Some are just very high profile like the Duke LaCrosse case, or even Justice Kavanaugh (one of the 4 women accused him of sexual assault).
The FBI published that 8% of rape accusations are false.
It is very difficult to investigate and many are merely he said/she said and unknowable unless the woman literally confesses to lying or making up the charge. And even then it is not impossible that a raped woman could recant just to make it all go away again.
The one single time that every rape accusation in a community was investigated, the fould that 40% of the rape accusations were fake allegations. It is controversial and a lot of people don’t believe it, but in the 1990s Eugene Kagan looked into over 100 rape allegations from one town and found that 40% of accusers had recanted their rape claim. Following up on that, he studies 2 universities and found that 50% of the women claiming forcible rape later recanted.
Take this with a grain of salt as it is a small sample size with a ton of variables, but at the same time, we used to have a sayingn “hell hath no fury as a woman scorned”.
You get a woman mad and you and it can be the easiest thing in the world for her to say you raped her. In the public eye, you are guilty as charged regardless if charges or filed or you are found not guilty at trial. People will always believe you raped her.
So I know the Kagan studies are tiny in scope and anecdotal, but it is the only time anybody really tried to examine the number of false rape accusations, and it ran 40% to 50%, with reasons ranging from revenge to wanting attention to regret over a consensual sexual act.
Or you can use the FBI value of 8%. That is not insignificant.
My wife says that in 1972 when she went off to college, that sexual assaults on dates, not necessarily full fledged rape, was more common than we men like to believe. There was a lot of stigma attached to reporting it. She says there were guys that were very good at spotting and singling out the girls with low self esteem.
Disclaimer: She is a firm conservative and says that most women victims don’t have to be. She had a teacher in college who gave her a low grade and when she told him that it was an “A” paper he agreed and told her she could come to his office and work it out on the sofa.
She said I’ll take the C- and drop your class.