Everybody who is an Econ major

经济专业
and you're a senior or a junior you probably know.

大三大四的同学或许会知道
Other than that you probably think

否则你会认为
it's some kind of horrible skin disease.

这是一种可怕的皮肤病
Endogeneity means that the factors that you're studying

内生性意味着你所研究的因素
could actually be-- it could be some reverse causality going on,

很可能会有反向的因果关系
or there could be some--

或者是
a common unidentified factor that could be driving both of them,

由某个未知因素同时决定的两个因素
and you have to find some way of sorting this out.

而你在研究中就需要分辨出来
The question is--so the one way to do this is to find some

有一种方法是找到
independent phenomena to observe.

某种独立现象进行观察
That's what's being proposed.

这正是最常用的方法