On April 5, 2018, a workshop was organized as part of the work of the Innovation & Regulation Chair in Digital Services on « platform economics and e-commerce », with presentations by researchers from CREST and Telecom ParisTech as well as some visiting researchers, including Frank Verboven, former titular professor of the Chair. Thirty researchers, juniors or seniors, attended this workshop. The work presented focused on the impact of online travel agencies such as Booking or Expedia on the economy of the hotel industry, the impact of e-commerce on price convergence within the European Union and big data as a source of market power.