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  • September 2018
  • Article
  • Quantitative Marketing and Economics

Aggregation of Consumer Ratings: An Application to Yelp.com

By: Weijia Dai, Ginger Jin, Jungmin Lee and Michael Luca
  • Format:Print
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Abstract

Because consumer reviews leverage the wisdom of the crowd, the way in which they are aggregated is a central decision faced by platforms. We explore this "rating aggregation problem" and offer a structural approach to solving it, allowing for (1) reviewers to vary in stringency and accuracy, (2) reviewers to be influenced by existing reviews, and (3) product quality to change over time. Applying this to restaurant reviews from Yelp.com, we construct an adjusted average rating and show that even a simple algorithm can lead to large information efficiency gains relative to the arithmetic average.

Keywords

User Generated Content; Crowdsourcing; Yelp; Social and Collaborative Networks; Information; Internet and the Web; Learning; Mathematical Methods; E-commerce

Citation

Dai, Weijia, Ginger Jin, Jungmin Lee, and Michael Luca. "Aggregation of Consumer Ratings: An Application to Yelp.com." Quantitative Marketing and Economics 16, no. 3 (September 2018): 289–339.
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About The Author

Michael Luca

Negotiation, Organizations & Markets
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More from the Authors
  • Shanty Real Estate: Teaching Note Supplement By: Michael Luca
  • Black Ownership Matters: Does Revealing Race Increase Demand for Minority-Owned Businesses? By: Abhay Aneja, Michael Luca and Oren Reshef
  • Digital Public Health Interventions at Scale: The Impact of Social Media Advertising on Beliefs and Outcomes Related to COVID Vaccines By: Susan Athey, Kristen Grabarz, Michael Luca and Nils Wernerfelt
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