@article{parallelsgdwhendoesaveraginghelp,
  title = {Parallel SGD: When does averaging help?},
  author = {Jian Zhang and Christopher De Sa and Ioannis Mitliagkas and Christopher Ré},
  year = {2016},
  eprint = {1606.07365},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1606.07365v1},
}