По информации в статье: Etchells, Pete. 2015. “Declinism: Is the World Actually Getting Worse?” Guardian, January 16. http://bit.ly/2cWK1D7.
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Chambers, John R., Lawton K. Swan, and Martin Heesacker. 2013. “Better Off Than We Know: Distorted Perceptions of Incomes and Income Inequality in America.” Psychological Science, 1–6.