That's part of public finance--is learning how to modify the tax system so that it works pretty well.

公共财政学的一个课题就是,研究如何改进税收制度，使其更有效。

耶鲁公开课 - 金融市场课程节选

That is a wild assumption, but it's fun to make, because I know pretty well-- I know very well--that people aren't doing this.

这是个大胆的假设，不过有趣的是，因为我很清楚-,我很清楚，人们并不会这么做。

耶鲁公开课 - 金融市场课程节选