eBay新模型让商品详情页更智能，高价值商品转化率提升0.58%，电商推荐系统值得参考。
eBay提出两阶段XGBoost模型，用于优化商品详情页信号展示。该模型在整体GMB（商品购买总额）上提升0.08%，在配件类GMB上增长0.58%。实验表明，高平均价格商品的转化率是主要增长点。模型通过反事实估计优化信号推荐策略。
Stageboost: Recommending Signals Based on Counterfactual Estimation
Signals are short textual or visual snippets displayed on the eBay View-Item (VI) page, providing additional, contextual information for users about the viewed item. The aim of displaying these signals is to facilitate intelligent purchase and to incentivize engagement. In this paper, we present a 2 stage xgboost based model that optimally populates the VI page with signals. This approach has shown a 0.08% lift in overall GMB (Gross Merchandise Bought) and 0.58% increase in Parts and Accessories GMB, primarily due to increase in conversion of high average price items in online experimentation.