“不一定。”经济研究员萨拉·约翰逊说。

"Not necessarily," says economic researcher Sara Johnson.

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我把这个问题提给了卡罗尔，她是布鲁克林学院的幸福经济研究员。

I posed this question to Carol Graham, a Brookings Institution researcher who studies the economics of happiness.

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此外，他但是国民经济研究局的一名研究员。

He is also a faculty research fellow at the National Bureau of Economic research.

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此外，他但是国民经济研究局的一名研究员。

He is also a faculty research fellow at the National Bureau of Economic research.

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