Causal connection in parsec-scale relativistic jets: results from the MOJAVE VLBI survey E. Clausen-Brown, T. Savolainen, A. B. Pushkarev, Y. Y. Kovalev and J. A. Zensus A&A, 558 (2013) A144 Published online: 23 October 2013 DOI: 10.1051/0004-6361/201322203