# 跪求經濟學題目翻譯~感謝感謝

1.Suppose that,at the market clearing price of natural gas,

the price elasticity of demand is -1.2 and the price elasticity

of supply is 0.6.What will result from a price ceiling that is

10 percent below the market clearing price？

Update:

Rating

No, demand and supply curves do not necessary be linear.

2011-06-12 21:22:30 補充：

Suppose that,at the market clearing price of natural gas,

the price elasticity of demand is -1.2 and the price elasticity

of supply is 0.6.What will result from a price ceiling that is

10 percent below the market clearing price？

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翻譯

假設天然瓦斯在市場結清(均衡)時，需求的價格彈性為-1.2

供給的價格彈性為0.6。這時在市場結清(均衡)價格下10%

(九折)設定價格上限會有什麼結果????

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需求(供給)的價格彈性定義為

( dQ / Q ) /( dP / P ) = 價格改變1%的情況下，需求(供給)數量改變的百分比

現在題目中說到在均衡價格減價10%的價格設定價格上限

所以需求改變為10%*-1.2=-12%

同理供給改變為10%*0.6=6%

題目中只問說結果怎樣????

看來應該是問說供給跟需求的差距(超額供給)為多少=6%-(-12%)=18%

2011-06-14 13:01:18 補充：

Linear is "never" remain elasticities the same.

Since, you persist that it's linear.

Suppose a linear demand P=10-Q

( dQ / Q ) /( dP / P )= (dQ/dP)X(P/Q)

So,dQ/dP=1, is constant.

What happen to P=0 and P=5

one elasticity is 0 and the other is 1

2011-06-14 13:05:29 補充：

You can replace "point easticity" with "arc elasticity"

2011-06-15 07:45:35 補充：

Well, as my introduction "大家討論練功夫 "

To discuss is to learn.

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• I assume that both the demand and supply are linear?

2011-06-13 22:39:16 補充：

If they are not linear, how can you assume that the elasticities remain the same at the price ceiling in question as in market clearing price?

2011-06-15 06:15:49 補充：

You are right.

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