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偏好关系 - Wikipedia

偏好关系

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偏好关系(Preference Relations),是在偏好法中,消费者的选择问题可以被归结为,对于被选集X中的一对子集x,y\in X,消费者可以对来进行比较并确认一个二元关系,“≳”,有时候也称为“弱偏好关系”。例如xy,读作“x至少和y一样好”。

从此关系能够定义另外两种关系,即,

  1. 强偏好关系(“≻”),即,xyxy, 但非yx。读作“x优于y”。
  2. 无差别关系(“\sim”),即,x\sim yxy,且yx。读作“xy无差异”。

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