Su Liu

Su Liu

Senior Researcher
  • Health Care Financing and Insurance
  • Medicaid and Medicare
  • Program Evaluation
  • Data Analytics and Measure Development
Focus Areas
  • Health
  • Delivery System Reforms
  • Disability
  • Employment and Income Support
  • State Health Policy
  • Human Services
About Su

Su Liu’s research focuses on access, cost, and quality issues for programs serving vulnerable populations, such as people with low-income, the elderly, people with disabilities, and the uninsured in the United States.

Liu plays key roles in federal- and state-funded research projects, including evaluation of the Medicaid 1115 demonstration, development of data analytics for Medicaid and CHIP (Children’s Health Insurance Program) Business Information Solutions, risk adjustment for quality measure development, and technical assistance for states’ coverage expansion initiatives and spending projections. She has led the development of quantitative measures of participation in state Medicaid buy-in programs, refining techniques to integrate administrative data from multiple agencies to track employment and health expenditures for adults with disabilities. For Mathematica’s large-scale evaluation of the Ticket to Work program, she monitored the implementation and effectiveness of initiatives authorized by Ticket to Work and the Work Incentives Improvement Act.

Before Liu’s time at Mathematica from 2003 to 2010, she held positions at the University of California, AARP, and the International Institute of Applied System Analysis in Austria. Before rejoining Mathematica in 2015, she was also a faculty member at the School of Public Health and Primary Care at the Chinese University of Hong Kong and a visiting scholar at the University of Oxford’s Health Economics Research Centre. She has a Ph.D. in economics from the University of California, Irvine.

Key Projects
  • worker wearing hard hat in wheelchair
    Medicaid Buy-In Program

    The Medicaid Buy-In program allows adults with disabilities to earn more than would otherwise be possible and still have Medicaid coverage. In return, participants “buy into” the Medicaid program, typically by paying premiums based on income. To assist CMS in monitoring the program, Mathematica has developed...