@InProceedings{puranam-cardie:2014:W14-27,
  author    = {Puranam, Dinesh  and  Cardie, Claire},
  title     = {The Enrollment Effect: A Study of Amazon's Vine Program},
  booktitle = {Proceedings of the Joint Workshop on Social Dynamics and Personal Attributes in Social Media},
  month     = {June},
  year      = {2014},
  address   = {Baltimore, Maryland},
  publisher = {Association for Computational Linguistics},
  pages     = {17--27},
  url       = {http://www.aclweb.org/anthology/W/W14/W14-2703}
}