...The function u(・), which assigns a numerical value to each object, can be defined so that for any x and y, u(x) = u(y) + α if and only if x ≿ α y. This function u(・) is called the cardinal utility function. Utility functions allow us to numerically handle the preferences between objects that humans have, and are a fundamental concept in fields that measure human sensations, including economics and psychology. ... *Some of the terminology explanations that mention "cardinality utility function" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このとき,対象のそれぞれに数値を対応させる関数u(・)を,任意のx,yについて,x≿αyのときかつそのときに限ってu(x)=u(y)+αとなるように定めることができる。この関数u(・)を基数効用関数という。 効用関数は人間のもつ対象の間の選好を数値的に取り扱うことを可能とするものであって,経済学,心理学をはじめ人間の感覚を計測する分野において基本的な概念を構成している。… ※「基数効用関数」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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