关于残差的平方

问题如下：

A log-linear trend model is also estimated on annual euro area GDP from 1995 until 2018. The estimated model is :

and the estimated standard deviation of εt is 0.0322. Assuming that the shocks are normally distributed, what is the point forecast of GDP for the next year?

选项：

A.

9.308

B.

9.336

C.

11031.4

D.

11186.9

解释：

In this case:

Calculating E[ln RGDPt]:

Furthermore,