Baroness Stern did a bit more research on false rape allegations and concluded that false rape allegations are lower than false allegations of other crimes. So that 8% figure is likely to be enormously inflated.
The idea that rape is a crime women are more likely to lie about than most people are to lie about most other crimes, has never had any basis in fact or reality. That's the dismaying thing about it. When you first start looking at this, you cannot believe that the lie that women lie about rape, is so firmly entrenched in our culture without some good reason. The only reason, is literally male supremacy. The lie was invented and believed because women were believed to be less reliable, less rational and generally less morally upstanding than men. And men controlled the courts and legal process.
The only real research that was done to back up the "women are liars" myth, was to look at police reports to find out how many false reports the police were receiving. There were a couple of these studies which were used to confirm the widespread opinion that women are liars, because the results showed that something like 40% of rape reports were false. The reason the figure was so high, was purely and simply because the police men who logged the reports, believed that women were liars about rape and didn't bother to investigate whether the women were actually raped. They just instantly dismissed their claims as false and their opinion became researched fact.
And of course, male-led research didn't think to question mysogynistic assumptions about rape and women.
And these studies were used to provide data to back up the misogynist lie that women lie about rape. What we know, is that actually, men lie about rape. A lot. A whole lot more than women do.