A Dutch scholar, Ruut Veenhoven, has created a World Database of Happiness, including national rankings.

荷兰学者，拉特维荷芬，创造了一个包括国家等级在内的世界幸福数据库。

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The authorities at the World Database on Happiness have surveyed levels of happiness in different countries.

“世界幸福数据库”的专家调查了不同国家的快乐程度。

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Instructions for obtaining and setting up the world database may be obtained from the Resources section of this article.

有关获取和设置world数据库的指导，可以参考本文的参考资料部分。

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The data will be stored online, creating the biggest such national database in the world.

VOA: standard.2009.09.24

The World Database of Happiness, which is run out of Erasmus University in Rotterdam, Holland, counts 7, 494 names in its Directory of Happiness Investigators--published academics or research groups every one.

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All of the GDP per capita PPP values were taken from the World Bank Database and refer to 2011.

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