http://www.powerofpurpose.org/winners/printer_hartman.html
"Six years after conception, and almost four years after implementation, the results have been impressive. There have only been a couple of incidents when the opposition managed to slip some ringers into our midst; no guards assaulted, no mass uprisings or riots or strikes. (No small feat in a state prison system that is, literally, in a meltdown, with uprisings and riots and strikes happening daily in other prisons.) A flourishing culture of positive energy that includes lowering of racial barriers and a growing sense of ownership. New arrivals are advised by other prisoners that this is a good thing, so don�t screw it up. There is even optimism; just a bit, because prisoners tend to be the most pessimistic people in the world. More fundamentally, there is a sense of possibility, of expectation."
