I evaluate how policies and programs affect access to services, population outcomes, and the distribution of benefits across communities. Using causal inference, econometrics, administrative data, and policy evaluation methods, I examine what changed, for whom, and under which institutional or implementation conditions. I translate these findings into actionable evidence that can help decision-makers strengthen existing policies, address unintended consequences, and identify opportunities for more effective and equitable investment.

Selected Publications:

1. Williams AM, Saldarriaga EM, Cramer R. State-level trends in access to Medicaid family planning services, 2008-2023. Health Serv Res. 2024 Oct 22;
2. Saldarriaga EM. An incomplete step in the right direction: Peru’s National Institute of Health establishes cost-effectiveness threshold. Rev Saude Publica. 2023;56:106.
3. Saldarriaga EM, Williams A, Spicknall I, Pearson B. The Impact of Medicaid Expansion on the Nationally Notifiable STDs, 2007 – 2022: A Causal Inference Study. Under institutional clearance.
4. Williams A, Saldarriaga EM, Miele K, Nguyen A, Eppink S, Romero L, Cramer R. State Medicaid Family Planning Policies Were Associated with Decreased Rates of Congenital Syphilis. Under institutional clearance.