老师，这道官网题从哪里能看出短期利率要变得steeper？

请问structural model和reduced model的区别是什么？

The dataset is typically divided into three non- overlapping samples: (1) training sample used to train the model, (2) validation sample for validating and tuning the model, and (3) test sample for testing the model’s ability to predict well on new data. The training and validation samples are often referred to as being “in- sample, ” and the test sample is commonly referred to as being “out- of- sample. ”。 原版书说tranning 和 validation sample 都是in sample的 我们的讲义和老师说的是 validation 是out sample的

这个题point 1不对吧？保险公司的liability又不确定。

老师，R3原版书对status quo bias的解释用到了errors of commission和errors of omission。而R27也提到了这两个术语（一类错误属于error of commission，二类错误属于error of omission）。老师，能否给讲讲，errors of commission和errors of omission分别是什么意思？

请问老师A为什么可以影响spread

老师请讲解一下第9题，A为什么不对，C答案是什么意思

45:04秒老师说的shutdown point做的是短期决策，这个不对吧？长期决策也有shutdown point啊？

4组k值是啥，请老师发一下。

老师，请问EBIT=Q（P- VC）- FC吗