政策规则优于自由裁量,因为它们避免了时间不一致性问题。
We are all prisoners of our own experiences, and no one can truly understand another's pain.
文明的真正考验不是人口普查,不是城市的规模,也不是庄稼的产量——而是这个国家培养出什么样的人。
In mathematics, truth is somewhere out there in a place we don’t yet know, and the only way we can hope to find it is by exploring.