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The robust selection of rationalizability

机译:合理性的强大选择

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We propose a notion of selecting rationalizable actions by perturbing players' higher-order beliefs, which we call robust selection. Similarly to WY selection [28], robust selection generalizes the idea behind the equilibrium selection in the email game [27] and the global game [3]. In contrast to WY selection, however, we require selection to be robust to misspecifications of payoffs. Robust selection is a strong notion in the sense that, among types with multiple rationalizable actions, "almost all" selections are fragile; but it is also a weak notion in the sense that any strictly rationalizable action can be robustly selected. We show that robust selection is fully characterized by the curb collection, a notion that generalizes the curb set in [2]. We also use the curb collection to characterize critical types [12] in any fixed finite game.
机译:我们提出了一种通过扰动玩家的高阶信念来选择合理行动的概念,我们称之为稳健选择。类似于WY选择[28],鲁棒选择概括了电子邮件博弈[27]和全局博弈[3]中均衡选择的思想。但是,与WY选择相反,我们要求选择对于收益的错误指定具有鲁棒性。健壮的选择是一个很强的概念,因为在具有多种合理化措施的类型中,“几乎所有”选择都是脆弱的。但是从可以严格选择任何严格合理化行动的意义上来说,这也是一个弱项。我们表明,路缘集合充分地表征了稳健的选择,这一概念概括了[2]中的路缘集。在任何固定的有限博弈中,我们还使用遏制集合来表征关键类型[12]。

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