What finance theory is based on-- and much of economics is based on-- the idea that people want to maximize the expected utility of their wealth.

金融学理论建立在,并且很多经济学的都是建立在,人们希望能使自己对,财富的期望效用最大化这一基础上

耶鲁公开课 - 金融市场课程节选

It's important--that's one reason why we want policies that encourage equality of incomes-- not necessarily equality, but reasonable equality-- because the people with very low wealth have a very high marginal utility of income and people with very high wealth have very little.

这非常重要,我们需要通过政策,来引导收入公平的一个原因就是这个,不是绝对的平等,是相对的平等,因为那些低收入的人群,对收出的边际效应相当的高,而高收入人群的则小得多

耶鲁公开课 - 金融市场课程节选