A、假设资本K与劳动L之间是完全可替代的
B、资本要素的边际产量MPk=a1
C、劳动要素的边际产量MPL=a2
D、劳动和资本要素的替代弹性σ=∞
在项目反应理论双参数模型中,能够直观地描述被试正确作答概率与被试特质水平关系的是()
A.区分度与难度
B.项目信息函数
C.项目特征曲线
D.测验信息函数
在简单凯恩斯收入决定模型的45O线中,消费函数与45O线相交点的产出水平表示()。
A.净投资支出了大于零时的GNP水平
B.均衡的GNP水平
C.消费C和投资I相等
D.没有任何意义,除非投资I恰好等于零
资本资产定价模型认为任何风险资产的收益是该资产相对于市场的系统风险的线性函数。 ()
A.正确
B.错误
当中央银行不改变货币政策时,政府希望不改变产出水平,又能降低通货膨胀2%时的最佳财政政策是什么?损失函数的值是什么? c.如果中央银行愿意合作,最佳政策组合是什么?损失函数的值多大? In some countries,the central bank is independent from the government.Consider a situationin which the government wants to reduce inflation without changing output,but the central bank would not change monetary policy. a.Can the government achieve its objectives by using only fiscal policy?Why? b.Assume that the effect of instruments on targets in this economy are represented by the following model(in deviations from the baseline):
and the loss function is
What is the optimal fiscal policy that the government should pursue when its objectives are to reduce inflation by two points without changing the level of output,if the central bank does not change monetary policy?What is the value of the loss function? c.Assume nOW that the central bank decides to cooperate.What is the optimal policy mix?What is the value of the loss function?
利用补充练习题3-18的数据。假设你被告知对鸡肉的真实的需求函数是
lnY=β0+β1lnX+β2lnP1+μ
而你却估计了原模型
lnY=β0+β1lnX+β2lnP1+β2lnP2+β3lnP3+μ
请对这两个模型进行偏误设定的RESET检验。
(x)=x2或g(x)=log(1+x2) 。定义zi=g(xi)定义一个斜率估计量为