世界是一本书,不旅行的人只读了一页。
无知永远不比知识更好。
我专注于未来,而非过去。
You'll never have a quiet world till you knock the patriotism out of the human race.
忠于自己,永不妥协你的价值观。
The best way to learn econometrics is by doing—working with real data and real problems.