Jonathan Phillips is a Faculty Affiliate at MIT GOV/LAB. He is an Assistant Professor at Leiden University, the Netherlands, and is currently on leave from the University of São Paulo, Brazil, until September 2023. His research seeks to understand the political roots of effective governance. His research projects focus on the competitive conditions under which politicians may choose to introduce governance reforms that dismantle clientelism; the interactions between state and society that shape vaccination coverage; and how gradual economic change alters the ways in which outsiders are mobilized into politics. Current projects with MIT GOV/LAB include collecting data with eHealth Africa to understand how social pressures and information diffusion contribute to vaccine willingness and hesitation in Nigeria.