The Results Center produces case studies of the most successful energy efficiency and renewable energy programs in the United States and around the world. Funded by the John D. and Catherine T. MacArthur Foundation, 126 case studies, 6 special reports, and 24 newsletters were published by Ted Flanigan and his colleagues from 1990 — 1996. Case Study #127, the German Solar Feed-In Tariff, was published in 2007.