此言差矣，异方差总是应考虑的，变量多时多重共线性也必须考虑，解释变量和被解释变量互为因果时需要联立方程组

这些都是标准的应该考虑的方面，怎么会不重要呢？

“计量经济学后面的异方差,多重共线性,联立方程组等等”

计量经济学前面的是啥？

Those are the most used, aren't they?

Multilinearlity, heteroelasticity, Qualitative response regression Models, Dynamic econometrics models appear frequently when we are doing survey and analysis.