作者ksherry (..)
看板Economics
标题Re: [请益]经济成长
时间Tue Jan 5 16:56:14 2010
※ 引述《betray911015 (回头太难)》之铭言：
: １假设每一工人小时的资本每年成长百分之三，而技术变动则每年成长
: 百分之二。若使用三分之一原则，我们可以推论每一工人小时的实质
: 国内生产毛额会每年成长百分之？
: 我的算法： △Y △A △K
: ------ = ----- + -------
: Y A K
: = 2% +3%*(1/3)
: = 3%
: 我这样算对吗？？
: 2.If the U.S. production funciton is Cobb-Douglas with capital share
: 0.3, output growth is 3 percent per year, depreciation is 4 percent
: per year, and the Golden Rule steady-state capital-output raio
: is 4.29, to reach the Golden Rule steady state, the saving rate must
: be:
: a.less than 18 percent
: b.more than 18 percent and less than 23 percent
: c.more than 23 percent and less than 28 percent
: d.more than 28 percent and less than 33 percent
: e.more than 33 percent
: 这题答案为 d，要怎麽算??
Y = N^0.7 * K^0.3 y = k^0.3 = f(k)
golden rule的k*由f'(k) = n + d
0.3 * 4.29^-(0.7) = n + d 可算出n + d
steady-state = sy = ( n + d ) k
可得s = 0.3
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◆ From: 122.117.210.20
1F：→ ksherry:顺便一题 这题其实不用算 如果生产函数是C-D型 01/05 16:57
2F：→ ksherry:黄金储蓄率就等於资本份额 01/05 16:58
3F：→ betray911015:谢谢，那我第一题ok吗?y 01/06 12:45