these multi-sided companies along with each company’s most important market segments. We then track their mergers and …

. The antitrust agency’s incentives to produce evidence on the efficiency of a merger proposal depend critically on its …We analyze evidence production in merger control as a delegation problem in an inquisitorial competition policy system … implemented only after evidence on the efficiency of a merger proposal has been produced. …

use a novel database that identifies over 20,000 product/geographic antitrust markets affected by over 2,000 mergers … many industries around the world since the 1980s. Two major criticisms of these studies is that concentration and market … scrutinized by the European Commission between 1995 and 2014. We show that concentration, as measured by the market-specific post-merger …

dataset at the level of the relevant antitrust markets and containing all merger cases scrutinized by the Commission over the …We study the evolution of EC merger decisions over the first 25 years of common European merger policy. Using a novel … definition and the complexity of the merger. Simple, linear probability models as usually applied in the literature overestimate …

We study the effect of a merger between two Dutch supermarket chains to assess its effect on the depth as well as … composition of assortment. We adopt a difference-in-differences strategy that exploits local variation in the merger's effects …, controlling for selection on observables through a matching procedure when defining our control group. We show that the merger led …

In the past 20 years, large digital platforms have made many acquisitions, mainly young and innovative startups. Few of …

online platforms. We analyze tracker-specific web browsing data to show how the prediction quality of consumer profiles …

Digital platforms, empowered by artificial intelligence algorithms, facilitate efficient interactions between consumers … competition between two platforms to study private and social incentives to share information. Sharing information can be welfare … platforms to collect and analyze more data. It has ambiguous effects on their competitors that depend on the exact relationship …

that would prevent a merger from harming consumers for 1,014 mergers affecting 12,325 antitrust markets scrutinized by the …Worldwide, the overwhelming majority of large horizontal mergers are cleared by antitrust authorities unconditionally …. The presumption seems to be that efficiencies from these mergers are sizeable. We calculate the compensating efficiencies …