I am an economist by training and interested in the evaluation of healthcare policies and clinical interventions, with a focus on vulnerable sub-populations. I have long-standing experience in the use of administrative and claims data and application of causal models for observational data. I have collaborated on cost and cost-effectiveness evaluation of clinical interventions at the provider level. My ongoing studies examine the impact of the Affordable Care Act insurance expansions on disparities in healthcare access and outcomes, unintended consequences of CMS performance-based payment programs, and the effects of the ambulance diversion on disparities in access to ED care. I also serve as the Director of the Program in Health Services Research.