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2. Most people are pretty happy, but there is cultural variation: The Inughuit, the Amish, and the Maasai;Biswas-Diener;Journal of Happiness Studies,2005
3. Clark , A. E. Flèche , S. Layard , R. Powdthavee , N. Ward , G. 2017 The key determinants of happiness and misery http://worldhappiness.report/wp-content/uploads/sites/2/2017/03/HR17-Ch5_w-oAppendix.pdf