An Extension Theorem for Rational Choice Functions
证明了一个扩展定理：一个偏好关系严格理性化选择函数当且仅当该选择函数满足显示偏好弱公理且该偏好关系是显示弱偏好关系的扩展，并讨论了在理性选择理论中的应用。
A choice function is strictly rational whenever it can be rationalized by a preference relation in a manner such that alternatives in a choice set are strictly preferred to alternatives in the corresponding rejection set. We demonstrate an Extension Theorem which asserts that a preference relation strictly rationalizes the choice function if and only if the choice function satisfies the Weak Axiom of Revealed Preference and the preference relation is an extension of the revealed weak preference relation. Then we consider various applications to rational choice theory.