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Microeconomics
总效用(TU)和边际效用(MU)之间的关系
总效用(TU)和边际效用(MU)之间的关系
Business
Microeconomics
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Business Microeconomics
Relationship between Total Utility and Marginal Utility

5.3: 总效用(TU)和边际效用(MU)之间的关系

1,416 Views
01:25 min
August 1, 2024
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Overview

总效用

总效用(TU)指的是从消费所有单位商品中所得到的总效用。例如,妮可(Nicole)吃了第一块披萨,这给她带来了极大的满足感。这是她从第一块披萨中所得到的总效用(TU)。她从第二块披萨中同样得到了一些满足感。从第一块和第二块披萨中所得到的效用总和就是两片披萨的总效用(TU)。总效用(TU)指的是消费所有披萨的累计满足感。

边际效用

边际效用(MU)指的是多消费一单位商品时额外得到的满足感。当妮可吃第二块披萨时,她从吃第二块披萨中得到的额外满足感就是边际效用(MU)。当妮可吃第三块披萨时,她从这一块披萨中所得到的额外满足感就是它的边际效用(MU)。

总效用与边际效用之间的关系

边际效用(MU)是由总效用(TU)曲线的斜率来进行表示的。总效用(TU)的曲线最初是上升的,这反映出了其中的边际效用(MU)为正。当妮可无法从额外的一块披萨中得到满足感时,总效用(TU)曲线则会趋于平缓,以此来表示边际效用(MU)为零。当超过这一点时,她的总体满意度就会下降。从这里开始,总效用(TU)曲线将会开始下降,并且其中的边际效用(MU)为负。

Transcript

总效用 (TU) 是对产品所有单位消耗量的总体满意度。考虑一下 John 从午餐吃披萨中获得的效用。

从图形上看,x 轴显示 John 消耗的披萨数量,y 轴表示 Total Utility。

边际效用 (MU) 衡量一个人通过多消费一个单位的产品而获得的额外满意度。它的计算方法是将 Total Utility 的变化除以产品消耗的数量的变化。

此外,Total Utility 曲线的斜率给出了 Marginal Utility 曲线。Marginal Utility 曲线绘制在单独的图形上。

Total Utility 和 Marginal Utility 密切相关。最初,当 John 吃披萨时,Total Utility 上升到了一个点。之后它下降了。只要边际效用为正,总效用就会增加。

边际效用曲线与 x 轴相交的点,即边际效用等于零的位置,表示总效用最大化的点。

超过这一点,当边际效用变为负数时,总效用会减少。

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总效用 TU 边际效用 MU 累积满意度 消耗 TU 和 MU 之间的关系 满意度测量 TU 曲线 正 MU 零 MU 负 MU

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