@InProceedings{MoffatBST15,
  author = 	 {Alistair Moffat and Peter Bailey and Falk Scholer and Paul Thomas},
  title = 	 {User variability and IR system evaluation},
  booktitle = {Proceedings of SIGIR},
  year = 	 2015,
  month = 	 {August},
  note = 	 {To appear},
  location =     {Santiago}
}