It rises roughly in line with absolute income per head, not relative income.

幸福感大体随着绝对人均收入而非相对收入而上升。

He says, " Millennials are hitting the times when they should start really saving and investing, and earning higher incomes relative to their spending" .

" 千禧一代正赶上他们应该开始储蓄和投资，并且收入会比支出更高的时代。"

Yeah, that's a great question because, in the policy debate, an issue that comes up a lot is about relative incomes and how you perceive yourself relative to others.

这是一个很好的问题，因为在政策讨论中，经常提到的一个问题是相对收入，以及你如何看待自己与他人的比较。