答案如下
A firm uses three resources: X, Y, and Z. Let the prices of the resources be denoted Px, Py, and Pz, respectively. Let the marginal product of the resources be denoted MPx, MPy, and MPz, respectively. If we know that Px> y>z, then for the firm to cost minimize, which of the following must be TRUE?
A) MPx<MPy<MPz.
B) MPx>MPy>MPz.
C) MPx=MPy=MPz.
D) MPx<MPy>MPz.
Your answer: D was incorrect. The correct answer was B) MPx>MPy>MPz.
The cost minimizing condition is MPx/Px=MPy/Py=MPz/Pz. Thus, if Px>y>z and the firm is cost minimizing, then MPx>MPy>MPz must be true. | 
发表于 2006-4-3 12:23
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