What Makes a Good Review: Analyzing Reviews on JD.com

Reviews are contents written by users to express opinions on products or services. However, the number of reviews is always large and the quality of reviews is various. In order to assess the quality of reviews, we ought to know the factors that have influence on or are related to the quality of reviews. In this paper, we present an in-depth study of reviews on JD.com, one of the famous E-commerce sites in China. We observed the times when users buy goods are highly related to the time when they post reviews. Meanwhile, the level of users is an important factor affects the quality of reviews. On the other hand, users prefer to post short reviews containing the description of the quality and price of the product. Based on a lexical resource containing sentiment annotations, we found sentimental words expressing users´ feelings and opinions is one of the key factors that can influence the quality of reviews. Finally, we evaluated the importance of more than 18 factors influencing the quality of reviews, and found these factors can be compressed into 5 principal factors.