I think it's still a work in progress, and some of the more recent ones in the U.S. have more private investment. Goldman Sachs has put up some money. For example, the New York City Rikers Island one is from private funding, but then there's a guarantee from the Bloomberg foundations. So I'm talking about models like that.
I think it's really a very novel method. If you're really interested in making a profit, you're going to be entering it cautiously and figuring out whether or not it's really an opportunity.