His research focuses on conflicts of interest in medicine and science and the ethics of public engagement in health policy making. He is particularly interested in conflicts of interest among patient advocacy organizations and other actors that claim to represent patients or the public in health policy debates. His recent work on these topics has been published in JAMA and the New England Journal of Medicine. His other research interests include health care resource allocation and the political representation of people with limited cognitive capacity. Matthew received a PhD in political theory from Princeton University in 2015. He was a postdoctoral fellow in the Department of Medical Ethics and Health Policy from 2015 to 2017.