So often the therapists were looking at prescribing equipment, such as canes or walkers, looking at making suggestions of how to modify the home to make it safer for the client."

VOA: standard.2010.06.14

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