不要信任所有人,但要信任有价值的人;前者是愚蠢的,后者是谨慎的标志。
The best way to learn econometrics is by doing—working with real data and real problems.
对付不自由的世界的唯一方法,就是变得如此绝对自由,以至于你的存在本身就是一种反抗。
In darkness, we learn to seek light; in despair, we learn to seek hope.