1. Unnatural Experiments? Estimating the Incidence of Endogenous Policies;Besley;The Economic Journal,2000
2. Claxton , G. L. Levitt M. Brodie R. Garfield A. Damico 2014 Health Reform: Measuring Changes in Insurance Coverage under the Affordable Care Act The Henry J. Kaiser Family Foundation http://kff.org/health-reform/issue-brief/measuring-changes-in-insurance-coverage-under-the-affordable-care-act/
3. The Henry J. Kaiser Family Foundation 2014 State Health Facts: Status of State Action on the Medicaid Expansion Decision, 2014 http://kff.org/health-reform/state-indicator/state-activity-around-expanding-medicaid-under-the-affordable-care-act/
4. The Henry J. Kaiser Family Foundation 2014 State Health Facts: State Decisions for Creating Health Insurance Marketplaces, 2014 http://kff.org/health-reform/state-indicator/health-insurance-exchanges/