Gilles Bransbourg won the French nationwide Concours Général award in History at the age of 17 in 1982 and then studied Economics, Mathematics and Statistics in Paris at Lycée Louis-Le-Grand, École Polytechnique, Sciences Po and École Nationale de la Statistique et de l'Administration Économique from 1983 to 1990. He became a market economist, specialized in financial derivatives, and held executive positions in the banking sector until running his own financial advisory company since 2005. By 2010, Bransbourg had completed a PhD in History at École des Hautes Études en Sciences Sociales.
He joined NYU’s Institute for the Study of the Ancient World in 2009, first as a Visiting Research Scholar and then Research Associate, and the American Numismatic Society in 2011 as an Adjunct Curator of Roman Coins, and then an Associate Curator in 2016. He has supervised Online Coins of the Roman Empire and curated the exhibition Signs of Inflation at The Federal Reserve Bank of New York in 2012.
His research deals with the economic and monetary aspects of the Greco-Roman world, with a comparative aim at other periods of history. Among his recent publications: "Currency Debasement and Public Debt Management at the Time of the Second Punic War', in P. v. Alfen, M. Amandry, and G. Bransbourg (eds), Essays in Honor of R. Wistchonke, 2015; ‘The Later Roman Empire’, in A. Monson and W. Scheidel (eds.), Fiscal Regimes and the Political Economy of Pre-modern States, 2015; ‘Les taux d'intérêt flottants des Sulpicii’, in C. Apicella, M. -L. Haack, F. Lerouxel (eds.), Les affaires de Monsieur Andreau: économie et société du monde romain, 2014; ‘Les états de l’inflation’ in Revue Numismatique 70, 2013; Rome and the Economic Integration of Empire, available through ISAW Papers, 2012; ‘Fides et Pecunia Numerata: The Roman Republic’ and ‘The Currencies of the Republic’ in the American Journal of Numismatics 23 and 25, 2011 and 2013.
A frequent guest speaker in academic colloquiums and venues, including Columbia University, University of Yale, Collège de France, Istituto Italiano per la Storia Antica, the 22nd International Congress of Historical Sciences at Jinan, École Pratique des Hautes Études, he lectured in Economics at Sciences Po between 1990 and 1994 and at the Executive Master of Finance of Sciences Po between 2007 and 2015. He now teaches at NYU, jointly with his ANS colleague Dr. P. van Alfen. Bransbourg also co-authored La Politique Monétaire de l'Euro (2009) and has been a contributor to Newsweek, Bloomberg News and Les Échos.