Francis Kramarz (1958) is a researcher at the Innovation Lab at the Collège de France, a Visiting Professor at Uppsala University, and is visiting Bocconi University for the year 2024-2025. He was Director of CREST, research Director at Ensae. He was also an associate professor at Ecole Polytechnique. His main fields are Labor economics, labor micro-econometrics, and Trade with a particular focus on the interaction of networks and firms. In particular, he and John Abowd have developed new methods for analyzing matched employer-employee panel data. He has published in Econometrica, the Quarterly Journal of Economics, the Journal of Political Economy, the Review of Economic Studies, the Journal of Econometrics, the Journal of Labor Economics, Review of Economic and Statistics, and other journals. He received with D. Fougère and J. Pouget the Hicks-Tinbergen prize for his paper on youth unemployment and crime published in the Journal of the European Economics Association. He also wrote a chapter of the Handbook of Labor Economics. His current research examines a novel friction, Bundling of Skills. He also tries to examine how networks affect firms. Francis Kramarz is a research fellow of CEPR (London) and since October 1999 of IZA. He has been made a fellow of the Econometric Society in 2013 and a fellow of the Society of Labor Economics.