After working for ten years in companies as a consultant, manager and then financial director, Hélène de Brébisson, a graduate of HEC Paris, taught for ten years at IESEG, where she also directed an apprenticeship Master's degree. She obtained her PhD at the University of Lille (2017). Her teaching focuses on accounting issues and is aimed at students and professionals of all levels, both beginners and specialists in these subjects. Her research work, both quantitative and qualitative, focuses on the economic consequences of the harmonization of financial information. It questions the role of the legal, linguistic and cultural environment in accounting practice, and explores the place of finance in small businesses. Hélène has published notably in the International Review of Law and Economics, Comptabilité - Contrôle - Audit and the Accounting, Auditing & Accountability Journal.