Verena SCHOENMULLER on campus Bâtiment S Salle T011
Speaker : Verena SCHOENMULLER
The Oracles of Online Reviews
We identify a segment of online reviewers who systematically review successful products in early stages of the product’s life. Using two large data sets of reviews for movies and books and the products gross profits or sales ranks (respectively) we create a reviewer score that measures a reviewer’s tendency to review successful products and identify oracle reviewers with high reviewer scores. We find that the higher the proportion of oracle reviewers in the crowd of reviewers, the more successful the product is. We also find that oracle reviewers do not necessarily like successful products but their mere appearance in the first week after product release can significantly increase the prediction of future success of the product. We show that the phenomena of oracle reviewers is robust across platforms in predicting various measures of product success. Finally, we identify text characteristics in the reviews text of oracle reviewers and find that they differ in writing style relative to non-oracle reviewers.