@inproceedings{tan-etal-2026-bottom, title = "Bottom-up Policy Optimization: Your Language Model Policy Secretly Contains Internal Policies", author = "Tan, Yuqiao and Wang, Minzheng and He, Shizhu and Liao, Huanxuan and Zhao, Chengfeng and Liang, Tian and Zhao, Jun and Liu, Kang", 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.1173/", pages = "26891--26910", ISBN = "979-8-89176-459-0" }