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。
In computer science, we often deal with problems that are easy to state but hard to solve.
没有人知道,也永远不会知道关于神和我所说的一切的真相;因为即使有人偶然说出了完整的真相,他也不知道;但表象覆盖了一切事物。