@article{JMLR:v15:feldman14a,
  author  = {Sergey Feldman and Maya R. Gupta and Bela A. Frigyik},
  title   = {Revisiting Stein's Paradox: Multi-Task Averaging},
  journal = {Journal of Machine Learning Research},
  year    = {2014},
  volume  = {15},
  number  = {106},
  pages   = {3621--3662},
  url     = {http://jmlr.org/papers/v15/feldman14a.html}
}