daniel stevenson
丹尼尔·史蒂文森
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The economists, Daniel W. Sacks, Betsey Stevenson and Justin Wolfers, found that the relationship between income and happiness is logarithmic.
FORBES: Mom Was Wrong: Money Does Buy Happiness. There's Research To Prove It
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