-competitive consequences of the merger as well as the related phenomenon of common ownership in the ride-hailing sector. Since the publication … of the post, the Uber-Grab merger has been approved, and similar transactions (eg between Uber and Careem) have taken …, while also updating it to take account of recent developments. It thus offers a preliminary guide to merger control and …

, market power, and post-merger price predictions. I show that with positive network externalities, traditional methods will … underestimate unobserved marginal costs and will overstate both platform market power and post-merger pricing predictions. I also …