@conference {Singer_www13,
	title = {Pricing Mechanisms for Crowdsourcing Markets},
	booktitle = {Proceedings of the ACM International World Wide Web Conference (WWW-13)},
	year = {2013},
	pages = {1157-1166},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/singer_www13.pdf},
	author = {Yaron Singer and Manas Mittal}
}
