The CESAM, thourgh the ILSM, co-oargnizes these Winter School and Workshop, which will take place in Louvain-la-Neuve on December 1-5, 2014 and will host as keynote speakers: Stefano Battiston (University of Zürich), Rama Cont (Imperial College London), Eric Kolaczyk (Boston University), Michaël König (University of Zürich), Kamil Yilmaz (University of Koç).