请问为什么要进行Resampling？意义在哪呢

老师，原版书后面有一道题：Increased household wealth will most likely cause an increase in: A.household saving; B. investment expenditures; C. consumption expenditures. 答案是C，但是请问为什么选项A不对？已知MPC+MPS=1，在总收入增加的同时并且没有提到MPC MPS ratio有变动，为什么savings不一起增加呢？

课后书有个问题：Which of the following statements is the most appropriate description of GDP? A.The total income earned by all households, firms and the government whose value can be verified; B. The total amount spent on all final goods and services produced within the economy during a given period; C. The total market value of resalable and final goods and services produced within the economy during a period of time, 答案是B，请问为什么选项A不对？

如果这四个利率分别+1，再相乘，开四次方根并-1，就是S4，当作I/Y，算出PV为什么等于996？

请问为什么要把非标准的正态分布转化成标准的正态分布？ 非标准的正态分布，直接用k值比如99%用2.58不也是可以吗？

老师，notes 上有一道题问：Long term sustainable growth of an economy is least likely to result from growth in: A. the supply of labor；B. capital per unit of labor； C. output per unit of labor. 请问答案为什么是B? long term sustainable growth是不是也可以理解为的LRAS 右移，那么增加capital per unit of labor不也是一种对于supply of physical capital的增加带来LRAS的右移么？以及选项C是什么意思？

老师这里习惯用DY、AOY，讲义的缩写DR、AOR是写错了吗？

这道题为什么不能这样算呢：管理费2%；绩效费（16%-8%-2%）*20%=1.2%；最后的收益就是：16%-2%-1.2%=12.8%

short receiver swaption请老师讲下

没看懂题目问的是什么，为什么计算的是15年对10年的