@InProceedings{Danescu-Niculescu-Mizil+al:13a,
  author={Cristian Danescu-Niculescu-Mizil and Robert West and Dan Jurafsky 
  and Jure Leskovec and Christopher Potts},
  title={No country for old members: {User} lifecycle and linguistic change in
  online communities},
  booktitle={Proceedings of WWW},
  year={2013}