We study the welfare effects of a merger between ad-funded platforms facing elastic consumer demand. We show that advertising fees as well as quality investment levels by the platforms fall post-merger. Interestingly, despite the lower advertising fees, advertisers may be worse off when their...

Since 2000, online platforms that are now within the scope of the European Union's Digital Markets Act (DMA), have bought nearly 700 small, promising companies worldwide. However, only 19 of their attempted acquisitions were notified to the European Commission, the authority exercising merger...