The US Supreme Court ruling in American Express marks a breakthrough for antitrust enforcement in two-sided markets. Not surprisingly, the ruling has sparked lively discussions in the antitrust law and economics community.The majority of the Court argues that if both groups of players are needed...

The emergence of the multi-sided platform business model has had a profound impact on the news publishing industry. By acting as gatekeepers to news traffic, large online platforms have become unavoidable trading partners for news businesses, and exert substantial bargaining power in their...

The aim of this chapter is to analyze recently released reports and policy papers to evaluate whether regulatory interventions reflect the distinctive features of digital markets and their leading players or whether the main thrust of these proposals for regulatory interventions is just to...