This book investigates the increasingly pervasive use of non-GAAP disclosure in corporate reporting, with a particular focus on the European context under IFRS. It explores both empirical and institutional dimensions, reviewing two decades of academic debate and evaluating recent and upcoming regulatory changes. The book includes a definitional review, an investigation of the most-used non-GAAP measures in Europe, an exploratory multi-country empirical analysis of the informativeness of non-GAAP earnings, and an assessment of compliance with ESMA guidelines.

Edoardo Nesi holds a Ph.D. in Business Administration and Management from the Universities of Pisa, Florence, and Siena (joint program), with a specialization in financial accounting and voluntary disclosure. He is a Certified Public Accountant and a Statutory Auditor. Edoardo has worked as a consultant and is currently a Postdoctoral Researcher at Ca’ Foscari University of Venice and Lecturer at the European School of Economics. In 2024, he was a Visiting Scholar at the Tull School of Accounting, University of Georgia (U.S.).

He has published academic work on financial communication and is actively engaged in innovation-oriented initiatives focusing on entrepreneurship and sustainability. In particular, he contributes to the iNEST project, where he supports the design and implementation of structured programs for technology transfer, venture building, and startup acceleration within strategic innovation ecosystems.

This monograph builds upon his doctoral research and reflects his ongoing interest in the intersection of standard setting, regulation, and corporate financial communication.