Julien is an Associate Professor in Economics and Public Policy at the Blavatnik School of Government, University of Oxford. His research is focused on issues of clientelism, electoral politics and social networks. He carries out field experiments, designs household surveys and uses large-scale datasets to test models of voter and politician behavior in developing countries. He has a particular interest in Southeast Asia and most of his fieldwork takes place in the Philippines.

Prior to joining the Blavatnik School, Julien was an Assistant Professor of Social Sciences (Economics) at Yale-NUS College in Singapore, and completed his PhD in the Economics Department at the University of Oxford. Julien previously worked at the World Bank and has consulted for the Asia Foundation, the Millennium Challenge Corporation and the OECD. Julien also holds Master degrees from the University of Oxford, University College London and ENSAE Paris Tech.