economic and policy factors influencing healthcare utilization and costs, 2) examining the economic implications of large-scale health system interventions, 3) assessing the economic burden of chronic disease and 4) developing novel methods applications to improve measurement of health system performance and the modeling of patient outcomes. Much of Dr. Wong’s research seeks to improve the quality, effectiveness and efficiency of primary care delivery. This includes extensive work evaluating the economic and clinical effects of VA’s national implementation of the patient-centered medical home model.