Here’s a stat worth knowing: In the UK, 63% of men who finish short-term prison sentences are back inside within a year for another crime. Helping them stay outside involves job training, classes, therapy. And it would pay off handsomely — but the government can’t find the funds. Toby Eccles shares an idea for how to change that: the Social Impact Bond. It’s an unusual bond that helps fund new social services — especially those where a small investment could create a much larger societal benefit. (And yes, investors, mainly NGOs, get a share of the profit if the service works.)