当你更清楚你是谁时，你将能更好地选择最适合你的。

I used to think the world was broken down by tribes. Then I thought it was broken down by rich and poor. Then I thought it was broken down by stupid and smart. But I know now that it is broken down by people who are alive and people who are dead.

开始的方法是停止空谈，开始行动。

Good econometrics is like good carpentry—it's all about using the right tool for the job.