CCIs 是什麼

Contrast the Kidney Heist story with this passage, drawn from a paper distributed by a nonprofit organization. " Comprehensive community building naturally lends itself to a return-on-investment rationale that can be modeled, drawing on existing practice, " it begins, going on to argue that "[a]factor constraining the flow of resources to CCIs is that funders must often resort to targeting or categorical requirements in grant making to ensure accountability."

以上一段出自一本書名 MADE TO STICK，不明白 CCIs 和 funder 是指什麼！請指點！