Stock fluctuations are correlated and amplified across networks of interlocking directoratesSerguei Saavedra, Luis J Gilarranz, Rudolf P Rohr, Michael Schnabel, Brian Uzzi and Jordi BascompteEPJ Data Sci., 3 1 (2014) 30DOI: https://doi.org/10.1140/epjds/s13688-014-0030-0