This Liber Amicorum brings together the contributions of 43 authors, in honour of Roger Van den Bergh. The contributions encompass many different topics, which reflects Roger's broad research interests. They are grouped together in four parts: Competition Law and Economics, Public Law and Economics, Private Law and Economics and Developments in Law and Economics. Many of the contributions contain links to Roger's work, as well as the authors' personal reflections on the importance of Roger for their work. This personal touch makes this Liber Amicorum, truly, a Friends Book for Roger.