The 6^th doctoral workshop in Digital Economics of AFREN (the French Association on Research in Digital Economics), supported by the Innovation & Regulation in Digital Services, took place October 15^th in Telecom-ParisTech, with about 30 reserchers coming from different unversities. 15 of them presented their works on various themes : economics of platforms, data brokers strategy, mergers impact on innovation, on line learning platforms, …