你停止学习的那一刻，就是你开始失败的那一刻。

You have to be willing to fail to be successful.

学习计量经济学的最佳方法是通过实践——处理真实的数据和真实的问题。

The difference between perseverance and obstinacy is that one comes from a strong will, and the other from a strong won’t.

语言是我们塑造现实最强大的工具。