He is in the Drug Policy Research Group, a research and fellowship training program focused on pharmaceutical outcomes and the quality of health care, which is also a World Health Organization Collaborating Center in Pharmaceutical Policy, at Harvard Medical School and Boston University. His career has focused on improving health systems in the United States and developing countries, including research on the effects of pharmaceutical policies, factors underlying the appropriate use of medicines, interventions to improve the quality of care, and applied research methodology in low-resource settings.