发表机构
The Chinese University of Hong Kong, Shenzhen; Shenzhen Institute of Artificial Intelligence and Robotics for Society; Shenzhen Loop Area Institute（香港中文大学（深圳）; 深圳市人工智能与机器人研究院; 深圳河套学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究AI建议在信息获取前介入对决策质量的影响，提出基于延续总价值凸性的准则，判定AI信号何时改善或损害总效用，并揭示集中关闭与注意力稀释等损害机制。
AI 中文摘要
AI建议越来越多地进入人类决策流程，在昂贵的信息获取和最终行动之前介入。本文研究此类建议如何影响决策质量，以最终行动的总效用衡量。建议在决策者选择具有均匀后验可分离（UPS）成本的获取实验之前改变信念。分析通过净最优获取产生的延续总价值来刻画总体效应。该价值函数的凸性是每个AI信号在每个先验下弱改善总效用的充分必要条件，而非凸性则允许二元信号造成总损害。该准则给出了紧致的状态空间结果。在二元状态问题中，在任意行动、支付和UPS成本下，每个AI信号都是弱总改善的。一个最小的三状态问题可以通过集中关闭产生总损害，即有价值的信息获取停止。对于具有香农获取成本的分类问题，该准则变为活动集斜率检验。它保证了同质分类和所有三状态加权分类问题的弱总改善，而一个最小的四状态失败源于注意力稀释，即获取从高利害区分中转移。沿着布莱克威尔递增的混合路径，总效用可能先下降后上升。在内生解释下，更便宜的解释可能降低总效用。
英文摘要
AI advice increasingly enters human decision workflows before costly information acquisition and final action. This paper studies how such advice affects decision quality, measured by the gross utility of the final action. Advice shifts beliefs before the decision maker chooses an acquisition experiment with uniformly posterior-separable (UPS) costs. The analysis characterizes gross effects through the continuation gross value generated by net-optimal acquisition. Convexity of this value function is necessary and sufficient for every AI signal to weakly improve gross utility at every prior, while nonconvexity allows a binary signal to cause gross harm. The criterion gives tight state-space results. Every AI signal is weakly gross-improving in binary-state problems under arbitrary actions, payoffs, and UPS costs. A minimal three-state problem can generate gross harm through concentrated shutdown, where valuable acquisition stops. For classification problems with Shannon acquisition costs, the criterion becomes an active-set slope test. It guarantees weak gross improvement for homogeneous classification and all three-state weighted classification problems, while a minimal four-state failure arises from attention dilution, where acquisition shifts away from high-stake distinctions. Along a Blackwell-increasing mixture path, gross utility can first decrease and then increase. With endogenous interpretation, cheaper interpretation can reduce gross utility.
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