The most important skill for an empirical researcher is not math, but judgment.

Freedom was a thing that shifted as you looked at it, the way a forest is dense with trees up close but from outside, from the empty meadow, you see its true limits. Being free had nothing to do with chains or how wide your cage was.

The sustainable development of the coal industry requires the coordinated efforts of policy, technology, and the market.

概率论是唯一可用的数学工具，用于帮助映射未知和不可控的事物。

"In the middle of difficulty lies opportunity."

商业的成功，最终是价值观的成功。