徵求個經高手幫解 - 經濟

來源: 100 政大商院轉學考

科目:經濟學

問題:

下面有六題, 題目是英文, 希望各位高手們能耐心看下去(不然只看5跟6也可以Q_Q)

如果你對其中隨便一題有想法的都可以在下面推文, 感謝指教


1.Intuitively, we usually believe that at equilbrium the total revenue of a

high-productivity producer is higher than the revenue of a low-productivity

producer.

Logically, suppose the elasticity of demand is constant,

it happens only when the elasticity is

(A) greater than one.
(B) equal to one.
(C) smaller than one.
(D) greater than the difference of productivity.

我的想法: 這一題我是看到題目中有總收入,

所以用獨占的角度 dTR/dP=Q(1-Ed) 所以彈性>1 選 (A)

但感覺題目不是在問獨占?

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2.Suppose that the production to produce is x=L-F, where L is labor,

F is a constant and x is the production level.

Suppose also that potential producers enter the market freely and producer

choose output level to maximize profit.

(A) The market structure must be perfectly competitive at equilbrium

because of the assumption of free entry.

(B) If the production is greater than zero, the market structure cannot be

perfectly competitive because it contradicts with the assumption of

profit maximization.

(C) There must be only one firm survive at equilbrium.

(D) The profit must be positive for all surving produer.

這題我猜(B) , 但我不知道他給那個生產函數是要如何使用.....

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3.X and Y are perfectly complement for consumer. Consumers can be categorized

as H and L according to their income level. H consumers are richer than

L consumers. The marginal cost of production is increasing for both X and Y.

The market structure is perfectly competitive.

The preference implies that the income elasticity

(A) is always greater than one
(B) is always smaller than one
(C) is always equal to one
(D) can be greater or smaller than one depending on consumers' income level

我想說完全互補是齊序效用函數, 所得彈性為1 選(C)

但是下一題就不會了

4. Based on question 3. Suppose that government transfers income from H to L.

Suppose also that the price is fixed at the original level. We difine

the aggregate quantity of demand of a good as the summation of H and L's

quantity of demand on that good. Then after the income transfer,

the aggregate quantity of demand

(A) is unchanged for both goods
(B) on both good decrease
(C) of X increases, while Y decreases
(D) on both good increase

這題我完全沒概念...

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5. The perfect competitive economy without friction is most efficient because

(A) demand is equal to supply at equilbrium

(B) the marginal utility of consumers equal to the marginal cost of production

(C) consumers have maximize utilities and producers have maximize profit

(D) all factor are employed

這題我一看到題目直覺聯想到P=MC 但選項中沒有, 感覺(B)有點像P=MC的概念,

但不太確定,另外(A)感覺符合競爭均衡的概念所以好像也可以選?

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6.When a firm operates under conditions of monopoly, it price is

(A) not constrained
(B) constrained by marginal cost
(C) constrained by demand
(D) constrained by its social agenda

我是想說獨占一開始先 MR=MC 決定 Q, 再對到需求曲線決定 P,

所以我選(C) 但(B)似乎也說得通?

另外, 如果此題改問完全競爭, 又該怎麼選?

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謝謝各位高手, 希望聽聽多方的意見!!!



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