William Encinosa1,2, PhuongGiang Nguyen3. 1. Division of Research and Modeling, Center for Financing, Access, and Cost Trends, Agency for Healthcare Research and Quality, 5600 Fishers Ln, Rockville, MD, 20857, USA. William.Encinosa@ahrq.hhs.gov. 2. Georgetown University McCourt School of Public Policy, Washington, DC, USA. William.Encinosa@ahrq.hhs.gov. 3. RAND, Santa Monica, CA, USA.