I have probably talked to more rape victims and men falsely accused than most. Statistics comparing actual rapes of women to false accusations against men are going to be inaccurate at best. There are a lot of variables going on. What most people think of as rape is just part of the problem. Sexual assault in general has many degrees and definitions, lots of legal statutes of limitations and reporting criteria and such a severe penalty that full blown convictions and sentences are limited by those factors.
I have dealt with everything from homicides involving rape, down to making lewd comments to coworkers. You can't make any generalization about it. For as many ways as there are to commit a rape....there are ways to falsely accuse another of the act. It boils down to how diligent an investigator is and sometimes how lucky. Most false accusations never get officially reported as such because the original report is that of a sexual assault and changing it requires opening up a new incident report with the victim listed as the suspect. It can be done but often the falsely accused is just happy it's over with and wants to just move on.
Many college related incidents involve alcohol or drugs. This muddies the water significantly. Date rape drugs that quickly leave the victim's system and delayed reporting often torpedos an investigation from the beginning. It's always an emotional nightmare and it was the last thing I wanted to hear at 2am when the phone rang. I much rather wanted to hear, possible homicide, suicide, robbery or accidental death.