Dr Christiane Hellmanzik (University of Hamburg) describes how mobility and peer effects worked for superstars of modern art in the 19th century. Dr. Hellmanzik presents the importance of peer effects for superstars of modern art in the 19th century Paris and New York. With carefully collected data from the archives and auction sales, she demonstrates how mobility and innovation is transformed if an artist migrates to a new territory, or stays in the homeland. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/