We evaluate programs, summarize policy implications, identify solutions, and improve programs using the most current and effective methods, data collection, and analysis. This work is disseminated in more than 100 reports, articles, and other publications that we produce each year, as well as through presentations to professional societies, clients, and decision makers. Driven by broad-based public interest in finding ways to improve the quality, efficiency, affordability, and equity of health care, Mathematica has made significant contributions to the body of research and data in care delivery and financing, quality measures, and health systems change.