Like I said in my other comment, some are more likely to reoffend because their prison time, but other were already more likely to reoffend, especially multiple felons who commit an extremely high percent of all crimes.
Just under 10% – which is certainly a minority, but still enough value that Michael Bury (Big Short investorguy) once had an entire fiscal quarter where his only net-increase positions were in for-profit prison operators.
Lots of money and facilities in private prisons, particularly in This South.