Not All Candidates are Created Equal: A Heterogeneity-Aware Approach to Pre-ranking in Recommender Systems.

@inproceedings{tong-2026-candidates, author = {Pengfei Tong and Siyuan Chen and Chenwei Zhang and Bo Wang and Qi Pi and Pixun Li and Zuotao Liu}, editor = {Hakim Hacid and Yoelle Maarek and Francesco Bonchi and Ido Guy and Emine Yilmaz}, title = {{Not All Candidates are Created Equal: A Heterogeneity-Aware Approach to Pre-ranking in Recommender Systems}}, booktitle = {{Proceedings of the ACM Web Conference 2026, WWW 2026, Dubai, United Arab Emirates, originally scheduled for April 13-17, 2026, rescheduled for June 29 - July 3, 2026}}, pages = {8051--8060}, publisher = {ACM}, year = {2026}, url = {https://doi.org/10.1145/3774904.3792825}, doi = {https://doi.org/10.1145/3774904.3792825} }