The Action Meeting on 16-18 October 2013 in Barcelona was hosted by the Institute for Economic Analysis (CSIC). It included the 3rd MC Meeting and a scientific programme put together by WG3 (information merging) and WG4 (matching). The invited speakers were Itai Ashlagi (Boston), Salvador Barberà (Barcelona), Irem Bozbay (Surrey), Federico Echenique (Los Angeles), Tamas Fleiner (Budapest), Umberto Grandi (Padova), Sébastien Konieczny (Lens), David Manlove (Glasgow), Antonio Miralles (Barcelona), Xavier Mora (Barcelona), and Gabriella Pigozzi (Paris). The local organiser was Flip Klijn. Full information is available at the Barcelona 2013 website.