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

As it's evolved in modern times, the corporation has a charter or bylaws.

而如今,这些关系得到了改进,公司有了许可证和规章制度

耶鲁公开课 - 金融市场课程节选