作者yupy1911 (Yupy)
看板Economics
标题Re: [请益] productivity
时间Sat Mar 31 12:36:21 2012
※ 引述《shorthaircat (短毛猫)》之铭言:
: in 2007 a firm produced 60000 calculators, employing 80 workers
: each of whom worked 8 hours per day.
: in 2008 the ame firm produced 76500 calactors, employing 85 workers
: each of whom worked 10 hours per day.
: between 2007 and 2008 productiviy at firm
: a) decreasd by 4 percent
: b) remained constant
: c) increased by 8.33 percent
: d) increased by 27.5 percent
: 我作法是先设 y= Y/L
: dy/y = dY/Y - dL/L
: = (76500-60000)/60000 - (85*10*365-80*8*3650/(80*8*365)
: = 0.275 - 0.3288125 = -0.05335 <0 (没这个答案)
: 我想问一下 我究竟错在哪里 计算结果明明是衰退
: 对於答案是c 其实我颇不解的
: THANKS
我算出来答案是A耶...
2007年每人每小时生产力 60000 / (80*8) = 93.75
2008年每人每小时生产力 76500 / (85*10) = 90
生产力变动:( 90 - 93.75 ) / 93.75 = -0.04
囧
是我被骗走了吗?
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◆ From: 123.192.128.238
1F:推 shorthaircat:你算对了..我刚刚才发现老师答案有勘误..是a 03/31 13:35
2F:→ yupy1911:XD 03/31 14:00