在简单的沟通游戏中，事前事实调查何时对接收者有利？
In Simple Communication Games, When Does Ex Ante Fact-Finding Benefit the Receiver?
摘要：
总是，如果状态的数量等于2;或者如果接收器动作的数量等于2且i。状态数为三个或更少，或ii。游戏是廉价的谈话，或二。只有两条消息可供发送者使用。一个反例提供了这些条件的每一个失败。
英文摘要：
Always, if the number of states is equal to two; or if the number of receiver actions is equal to two and i. The number of states is three or fewer, or ii. The game is cheap talk, or ii. There are just two available messages for the sender. A counterexample is provided for each failure of these conditions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
