Marie Trespeuch is a sociologist at the social sciences department of Orange Labs (Sense). She received her PhD from Ecole Normale Supérieure de Cachan in 2011 for a dissertation focused on the transformations of the French gambling market. Her research interests lie at the impact of the Internet on markets. Her recent studies deal with online valuation devices and the sharing economy. She is also interested in the moral issues on markets, and co-edited on this topic a book with Ph. Steiner (Marchés contestés. Quand le marché rencontre la morale, PUM, 2015).