EPO: Hierarchical LLM Agents with Environment Preference Optimization Qi Zhao author Haotian Fu author Chen Sun author George Konidaris author 2024-11 text Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing Yaser Al-Onaizan editor Mohit Bansal editor Yun-Nung Chen editor Association for Computational Linguistics Miami, Florida, USA conference publication zhao-etal-2024-epo 10.18653/v1/2024.emnlp-main.367 https://aclanthology.org/2024.emnlp-main.367/ 2024-11 6401 6415