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2/ > this learning-income gradient is signifcantly steeper in countries with a higher Gini coefcient of income inequality, consistent with the literature pointing to the importance of horizontal inequality in explaining intergenerational mobility
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3/ Thought experiment: posit two societies, A and B A is made up of people who have 100 IQs B is made up of people who have 80 IQs assume that we detect moderate intergenerational mobility in both A and B
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4/ I think it's also safe to assume that we will see that society A has a higher standard of living / average income than society B. Now...
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5/ Pick an empty island. Let's create society "C" by picking a sample of people from society A and a society of people from society B. Is the Gini coefficient in society C higher than in A and C? Almost certainly. Is intergenerational mobility lower? Almost certainly.
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6/ In this thought experiment "inequality" is not the cause of lower intergenerational mobility. ...mixing dumb people and everage people is the cause of both. The dumb will NEVER rise into the middle class. (through no fault of their own)
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