OMG! Just over half were able to withstand income verification. That means almost half of the borrowers lie about income.
That doesn't follow.
It is the best extrapolation I can make with the data available.
Prosper didn't randomly select listings for verification. It utilized a system intended to ferret out the higher risk listings. Of course, given Prosper's general ineptitude, its system probably wasn't very good.
You're right. But without knowing more I have to be skeptical of their secret-selection-criteria. Even if their selection technique had MODERATE success, that "about 50%" number is so high to make it very unlikely that they had a good result. Any selection criteria is a dull instrument. Sure, if some guy has HR credit and claims to make $1 Million/year, you ask him if he can verify that. Those don't come along very often. Routine cases are not so easy. Given the fundamental difficulty, we should expect to achieve only moderate selectivity. If we try, using the up-front numbers, to separate listings into two piles, so that one pile has a high fraction of liars and the other has a low fraction of liars, moderate selectivity means you aren't gonna end up with one pile with 50% liars and the other pile with 1% liars. That would require a very high selectivity. So given that we know that one pile (the pile they selected verify) had about 50% liars, what do we know about the other pile? It ain't gonna have 1% liars. That would strain credibility. Would require a nearly perfect selection method. We've seen no evidence whatsoever about the quality of the selection method. That second pile might have 50% liars, or 40% liars, or maybe even 10% liars, if you've done a really good job, but it ain't gonna be down at the 1% level. It doesn't take a very big fraction of liars to screw things up!
Do you wonder why AA loans are going bad at over 5%/year?
Now if I were an insider in a bank, I could look at all the data, and come to a more informed conclusion, but I'm not on the inside, and the numbers that they've just given us align with what we've been able to conclude by watching loan performance over the past two years: There's a lot of fraud.