立法机构不能将立法权移交给其他人，因为它只是从人民那里授权来的，拥有立法权的人不能将其转让给他人。
The best way to learn econometrics is by doing—working with real data and real problems.
It is in the thirties that we want friends. In the forties we know they won't save us any more than love did.
The most important thing in mathematics is to ask the right questions.