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。

I'm not used to bragging or talking about what I do. I prefer that people just watch me play and then make their own judgments.

In oil and gas, the companies that survive will be those that adapt fastest to the new realities of lower carbon demand.

时间是阻止光线到达我们的东西。