“…After dividing users by purchase rate, Kaneko and Yada [20] constructed an online prediction model for user purchase rate based on beta geometric/negative binomial distribution (BG/NBD), which can accurately forecast user purchase behaviors in 2.5 years. To predict the purchase behaviors of Taobao users, Kulkarni [21] added three concomitant variables, namely, the number of reviews, the number of favorites, and the repeat purchase rate, to the hybrid model of SVM and HIPP. Robinson et al [22] introduced the recency-frequency-monetary (RFM) model into the association rules of the traditional BG/NBD model, which, coupled with the update of weight coefficients, can process online purchase information, and predict user purchase trend in real time.…”