We investigate the relationship between market structure and platforms' incentives to adopt technological innovations in two-sided markets, where platforms may find it optimal to charge zero price on the consumer side and to extract surplus on the advertising side. We consider innovations that...

Contents: Preface by Jeong Pyo Choi -- 1. Introduction and overview / Jay Pil Choi, Wonhyuk Lim and Sang-Hyop Lee -- Part I: Setting the stage -- 2. Competition law and economics: International cooperation and convergence in competition policy / Jay Pil Choi -- Part II: Market structure -- 3....