@conference {Witkowski_hcomp13,
	title = {Dwelling on the Negative: Incentivizing Effort in Peer Prediction},
	booktitle = {Proceedings of the 1st AAAI Conference on Human Computation and Crowdsourcing (HCOMP{\textquoteright}13)},
	year = {2013},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/witkowski_hcomp13.pdf},
	author = {Jens Witkowski and Yoram Bachrach and Peter Key and David C. Parkes}
}
