@inproceedings{jin-etal-2026-bid, title = "{BID}-{SPO}: Rethinking Multi-Agent Prompt Optimization as Information Contracting via Bidding-based Shapley Values", author = "Jin, Weiqiang and Cheng, Yuxin and Sun, Tingting and Tang, Shixiang and Gao, Jing and Qi, Jinhu and Zhang, Wentao and Wang, Junli and Zhao, Biao and Zhao, Guoshuai and Yang, Guang", editor = "Lee, Hung-Yi and Dev, Sunipa and Li, Jessy and Elliott, Desmond", booktitle = "Findings of the {A}ssociation for {C}omputational {L}inguistics: {EMNLP} 2026", month = oct, year = "2026", address = "Budapest, Hungary", publisher = "Association for Computational Linguistics", url = "https://aclanthology.org/2026.findings-emnlp.239/", pages = "5029--5060", ISBN = "979-8-89176-462-0" }