Arnaud is a PhD candidate in the department of Economics. His main fields of interest are macroeconomics and public economics. In his main research project, he studies the role of publicly-funded R&D in fostering productivity growth by combining historical firm-level data on patents with a model of firm heterogeneity. In other, co-authored projects, he is investigating (1) the impact of cross-border shocks on production networks in Uganda and Rwanda, (2) the role of migration for firm growth in the UK and (3) the impact of price shocks on the production network of the state of São Paulo. Before joining LSE, he completed a BA in Economics & Political Science from Sciences Po (Paris) and a BSc in Mathematics from Sorbonne Université (Paris). He has also held pre-doctoral positions at the Harvard Kennedy School and LSE and visiting research positions at the Alan Turing Institute and the National Bank of Belgium. With colleagues at LSE, he has co-founded and run the Applicant Mentoring Programme, a mentoring scheme linking PhD students at Cambridge, LSE, Oxford, UCL and Warwick to applicants from underrepresented backgrounds interested in doing a PhD in economics.