Dr. Emily Gustafsson-Wright is a fellow at the Brookings Institution. She helped publish a report in summer 2015 with some of her colleagues entitled "The Potential and Limitations of Social Impact Bonds: Lessons From The First 5 Years of Experience Worldwide." Here we discuss exactly what a Social Impact Bond is, how it functions, and its potential ramifications for funding social service projects in the future. SIBs have only been around for 5 years, but they are already gaining a lot of attention, with potential investors ready to get involved in the game. So it is important to analyze what is working and what needs to be improved for the future.