John W. Byers, Michael Mitzenmacher, Georgios Zervas. The groupon effect on yelp ratings: a root cause analysis. In Boi Faltings, Kevin Leyton-Brown, Panos Ipeirotis, editors, ACM Conference on Electronic Commerce, EC '12, Valencia, Spain, June 4-8, 2012. pages 248-265, ACM, 2012. [doi]
Abstract is missing.