The chart's creator claimed to have been inspired by the book IQ and the Wealth of Nations and to have drawn his IQ data from the Ravens APM, but — save for the average income per state numbers, which were valid but outdated figures taken from the 1994 World Almanac — the chart was completely bogus. (The Ravens Advanced Progressive Matrices is not really a general intelligence test, nor do its publishers offer state-by-state test results data.) Nonetheless, a number of news publications (including the staid Economist) were taken in by the hoax — some mistakenly citing the information as having come from the book IQ and the Wealth of Nations, or even IQ and the Wealth of States — and published portions of the chart, and discussed it as if it were valid. (A similar hoax about presidential IQs produced similar media-fooling results back in 2001.)
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