*Opening Internet Monopolies to Competition with Data Sharing Mandates** * /Claudia Biancotti (PIIE) and Paolo Ciocca (Consob)// / /Policy Brief 19-3// // //April 2019/ Over the past few years, it has become apparent that a small number of technology companies have assembled detailed datasets on the characteristics, preferences, and behavior of billions of individuals. This concentration of data is at the root of a worrying power imbalance between dominant internet firms and the rest of society, reflecting negatively on collective security, consumer rights, and competition. Introducing data sharing mandates, or requirements for market leaders to share user data with other firms and academia, would have a positive effect on competition. As data are a key input for artificial intelligence (AI), more widely available information would help spread the benefits of AI through the economy. On the other hand, data sharing could worsen existing risks to consumer privacy and collective security. Policymakers intending to implement a data sharing mandate should carefully evaluate this tradeoff. FULL DOCUMENT: https://piie.com/system/files/documents/pb19-3.pdf