@conference {Byers_ec12,
	title = {The Groupon Effect on Yelp Ratings: A Root Cause Analysis},
	booktitle = {In Proceedings of the 13th ACM Conference on Electronic Commerce (EC-12)},
	year = {2012},
	pages = {248-265},
	url = {http://econcs.seas.harvard.edu/files/econcs/files/byers_ec12.pdf},
	author = {John W. Byers and Michael Mitzenmacher and Georgios Zervas}
}
