WORKING PAPER | ISSUE 06 | 23 NOVEMBER 2020DIGITAL PLATFORMS AND ANTITRUSTGEOFFREY PARKER, GEORGIOS PETROPOULOS AND MARSHALL VAN ALSTYNEDigital platforms are at the heart of online economic activity, connecting multi- sided markets of producers and consumers of various goods and services. Their market power and their privileged ecosystem positions raise concerns that they may engage in anti-competitive practices that reduce innovation and consumer welfare. This paper deals wi