1. Buchmueller, T.C. et al., “Union effects on health insurance provision and coverage in the United States”, Industrial And Labor Relations Review, Estados Unidos, vol. 55, núm. 4, 2002, disponible en: http://links.jstor.org/sici?sici=00197939%28200207%2955%3A4%3C610%3AUEOHIP%3E2.0.CO%3B2-L.
2. CENTERS FOR MEDICARE & MEDICAID SERVICES, “NHE Fact Sheet”, Web-site Centers for Medicare & Medicaid Services, Estados Unidos, 2013, disponible en: http://www.cms.gov/ResearchStatisticsDataandSystems/StatisticsTrendsand Reports/NationalHealthExpendData/NHEFacSheet.html.
3. Cohen, W.J. y Ball, R.M., “Social Security Amendments of 1965: Summary and Legislative History”, Website Social Security Administration, Estados Unidos, 2012, disponible en: http://www.ssa.gov/policy/docs/ssb/v28n9/v28n9p3.pdf.
4. CONGRESSIONAL BUDGET OFFICE, “The Impact of Unauthorized Immigrants on the Budgets of State and Local Governments”, Website Congressional Budget Office, Estados Unidos, 2007, disponible en: http://www.cbo.gov/sites/default/files/12-6-immigration.pdf.
5. CONGRESSIONAL BUDGET OFFICE, “Payments of Penalties for Being Uninsured Under the Affordable Care Act”, Website Congressional Budget Office, Estados Unidos, 2014, disponible en: http://www.cbo.gov/sites/default/files/45397-IndividualMandate.pdf.