1. Value-driven health care purchasing: four states that are ahead of the curve : overview Author(s): Silow-Carroll, Sharon, authorAlteras, Tanya, author Publication: [New York, New York] : Commonwealth Fund, August 2007 Subject(s): Cost SavingsHealth Care CoalitionsQuality of Health Care -- economicsMassachusettsMinnesotaUnited StatesWashingtonWisconsin