關於彈性與訂價 - 經濟

來源: 96 年度研究所考

科目: 經濟學

問題: The demand for mobile homesin Azerpjama, a small, oil-rich sheilkdom,
has been estimated to be Qd = 250,000 －35P.If this relationship
remains approxidmately valid in the future:

a.How many mobile homes would be demanded at a price of $2,000?$4,000?
b.What is the arc price elasticity of demand between $2,000 and $4,000?
c.What is the point price elasticity of demand at $2,000 and $4,000?
d.If 25,000 mobile homes were sold last year, what would you expect the
average price to have been?

我的想法:
a.b.c. 這3題沒有問題 , 問題在於d小題 .
我認為條件不夠無法解這題 , 要求平均定價的話應該要用弧彈性 .
但是 , 他只給我ㄧ個條件應該是無法求解才對 .

參考答案
高X 大X 陳X 的答案都為

當Q = 25000時 , P = 1/35﹙250000－25000﹚
= 6428.5

我覺得怪怪的 , 這不是說在Q = 25000時的需求價格 , 怎麼會說是預期的
平均價格 .


懇請幫忙解惑 , 謝謝 !




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