The stories are not autobiographical, but they're personal in that way. I seem to know only the things that I've learned. Probably some things through observation, but what I feel I know surely is personal.

Risk management is the most important thing to be well understood. If you don't have a good risk management system, you are going to blow up.

工具变量的美妙之处在于它们让我们以新的视角看世界。

The study of exoplanets is a journey of discovery, filled with surprises and challenges that keep us motivated.

解析：自然的法则，是损减有余来补充不足；人类社会世俗的作法却不然，而是损减贫穷不足来供奉富贵有余。

智能是在世界中实现目标的能力。