1. United States Census Bureau. American FactFinder. Available at: https://factfinder.census.gov/. Accessed August 5, 2017.
2. Wealth inequality in the United States since 1913: evidence from capitalized income tax data;Saez;Q J Econ,2016
3. National Academies of Sciences, Engineering, and Medicine, Health and Medicine Division, Board on Health Care Services. Accounting for social risk factors in Medicare payment;Steinwasch,2017
4. Systems practices for the care of socially at-risk populations,2016
5. National Academies of Sciences, Engineering, and Medicine. Accounting for Social Risk Factors in Medicare Payment: Identifying Social Risk Factors;Lane,2016