The best way to learn econometrics is by doing—working with real data and real problems.

死者并未消失。他们只是看不见了。

I'm not a saint, I'm not a sinner, I'm just a man who's made mistakes.

If everything was perfect, you would never learn and you would never grow.

译文：只要把握现在，做好当下的事情，不要管将来会有什么样的结果。

Happiness is not something ready-made. It comes from your own actions.