As a caveat right upfront, each jurisdiction that has developed a SIB model has adapted it very much to their local circumstance. In that case, it's a little difficult to generalize about the outcomes of all of them at the same time.
To date, we've seen that, in general, contracts have been more successful with larger, more established not-for-profits. They're usually not-for-profits that have in-house evaluation and research teams or have the resources that they can bring to the financial or consultant capacity that they need to pursue the bond. The smaller organizations that have been successful in pursuing them have had a lot of help from intermediary organizations—those that have had a strong relationship with an intermediary organization, who can help beef up maybe their evaluation capacity, or whatever areas that they're short on going in, and those that have done a strong sweep of their strengths and weaknesses before going in.