@inproceedings{li-etal-2026-denser, title = "When Denser Credit Is Not Enough: Evidence-Calibrated Policy Optimization for Long-Horizon {LLM} Agent Training", author = "Li, Yuanfan and Zhou, Qi and Duan, Wenjing and Chen, Lu", editor = "Lee, Hung-Yi and Dev, Sunipa and Li, Jessy and Elliott, Desmond", booktitle = "Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing", month = oct, year = "2026", address = "Budapest, Hungary", publisher = "Association for Computational Linguistics", url = "https://aclanthology.org/2026.emnlp-main.172/", pages = "3948--3965", ISBN = "979-8-89176-459-0" }