推 bibbycall:我解法跟陳偉一樣...D 05/07 22:48
題目:
Suppose the production possibilities for two countries, producing either food
or clothing, are shown in the below figure. They can each produce any linear
combination as well. Measuring food on the horizontal axis, the joint
production possibility frontier
(A)will have a slope of -2/3 over the entire frontier.
(B)will have a slope of -2 when less than 20 units of food are produced.
(C)will have a slope of -1 when less than 20 units of food are produced.
(D)will have a slope of -1/2 when less than 20 units of food are produced.
Total Potiential Output in Each Country Using All Resources in One Industry
USA Canada
Food 20 10
Clothing 10 10
高點解答: (C)
20f+10c=La
10f+10c=Lb ==> slope=-1,f<Lb/10
鼎茂解答: (A)
USA Canada Total
Food 20 10 30
Clothing 10 10 20 ==> slope=-2/3
陳偉解答: (D)
畫出聯合PPC:0<Food<20,10<Clothing<20:USA的PPC ==> slope=-1/2
20<Food<30,0<Clothing<10:Canada的PPC
三本書三種不同解答,我完全被搞迷糊了
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