Stock fluctuations are correlated and amplified across networks of interlocking directorates Serguei Saavedra, Luis J Gilarranz, Rudolf P Rohr, Michael Schnabel, Brian Uzzi and Jordi Bascompte EPJ Data Sci., 3 1 (2014) 30 Published online: 22 October 2014 DOI: 10.1140/epjds/s13688-014-0030-0