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🌷-J · 2020年12月01日

问一道题:NO.PZ2017100901000007 [ CFA I ]

问题如下:

The production relationship between the number of machine hours and total product for a company is presented below.

Diminishing marginal returns first occur beyond machine hour:

选项:

A.

3.

B.

4.

C.

5.

解释:

A is correct.

Diminishing marginal returns occur when the marginal product of a resource decreases as additional units of that input are employed. Marginal product, which is the additional output resulting from using one more unit of input, is presented below.

The marginal product of the third machine hour is 6 and declines thereafter. Consequently, diminishing marginal returns are first evident beyond three machine hours.

考点:边际效用递减

我们首先计算不同产量下的边际产量,如下表所示。

可以看到产量由3增加到4的时候,边际产量由6下降到5,所以产量3的边际效用开始出现递减。

为什么不是从4开始减少呢
1 个答案

丹丹_品职答疑助手 · 2020年12月02日

嗨,努力学习的PZer你好:


同学你好,1到2小时,增加一小时,多生产了3单位的产品(最后一列)

2到3小时,增加一小时,多生产了4单位的产品。

3到四小时,较之2到3小时,少了1单位的产品(6-5)

所以marginal returns 的减少就发生在第三小时以及以后的时间


-------------------------------
虽然现在很辛苦,但努力过的感觉真的很好,加油!


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