According to the Normal distribution (which describes the distribution of most human dimensions from height to intelligence, and let me say it, merit and hard-work) the range between the media minus one standard-deviation and the media plus one standard-deviation must contain 66,6% of the observations. As Dan Ariely - I wonder in which of the following 5 years is he going to win the nobel prize - shows us, when it relates to wealth (shouldn't it be a human dimension?) thinks are not quit like that. And the most impressive thing, although most of the americans would desire it (from Republicans to Democrats), they don't know the real distribution of wealth in America and they mistake it with the wealth distribution of Sweden (much closer to the Normal distribution).
You can check here all the details of the Study: "http://www.npr.org/2011/04/16/135472478/study-americas-wealth-not-widely-distributed?ft=1&f=1003"
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