This thesis addresses Big Data issues in competition law in three chapters. Chapter one proposes new economic tools to define the relevant market and the market power in the data-driven economy. It argues the need to reform the relevant market and the market power by considering new tools and a...

Privacy in competition cases is becoming common due to the importance of data. The literature thus focuses on the role of data and privacy in antitrust and merger control laws. Yet, the literature does not offer an empirical overview of the cases to understand how countries investigate the...

Large digital platforms acquired 1149 firms in various economic sectors between 1987 and July 2022. The European Commission reviewed only 21 of these mergers as most did not meet the European Union merger control turnover threshold. This suggests under-enforcement, with some problematic mergers...

Large online platforms are intermediaries between end-users and business users. They sometimes propose their own products and services alongside those of rivals. This can lead to platforms promoting their offers over those of competitors in so-called self-preferencing.The European Union Digital...