[作業] 總經達人請進

[angie0716 (大寶與困寶)]

是我的小考  但考完了老師都不說答案@@

1) suppose the economy's production function is Y=A* K的0.3次方* N的0.7次方,

   if K=2000 N=10 ,and A=1,then Y=246. if K and N both rise by 20%, and A is

   unchanges, by how much does Y increase?

   A) 5%   B)20%   C)10%   D)15%   (跪求算式)


2) if Y=A*N*(75+K/N), where K=1000, N=20,and A=10, whathappens if K doubles

   and N doubles?

   A) Y doubles  B) Y quadruples  C) Y increase 50%  D) Y is unchanged


3) an economy has government purchases of 1000.desired national saving and

   desired investment are given by

               desired national saving=200 +5000r +0.10Y -0.20G
                    desired investment=1000 -4000r

   when the full-employment level of output equals 5000, then the real

   interest rate that clears the goods market will be

   A) 16.67%    B)1.11%    C)5.56%    D)21.11% (跪求算式~)

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→ bookticket:看一下板規第六點...
→ davidlhs:第一題是常考的Solow Residual
→ davidlhs:lnY=lnA+0.3lnK+0.7lnN
→ davidlhs:y(dot)=A(dot)+0.3K(dot)+0.7N(dot)
→ davidlhs:X(dot)=X的成長率, K(dot)=N(dot)=0.2
→ davidlhs:A不變, 則, Y(dot)=You got it!
→ davidlhs:第二題, K,N都兩倍, K/N沒變, 帶進去..
→ davidlhs:                  改錯字--> 代