Marta Soler (University of Barcelona), Esther Oliver (University of Barcelona) and Iñaqui Santa Cruz (Autonomous University of Barcelona) with Ofer Sharone from MIT (Massuchesetts Institute of Technology) and James Anderson from Cleveland Evergreen Project participated in the ” Invited Thematic Session Worker-owned cooperatives: Transformative possibilities and constraints, ASA, 2012″ celebrated in Denver Colorado.