2/ > Absolute economic mobility is also declining—the odds that a middle-class child will outearn his parents have fallen by more than half since mid-century—and the drop is greater among the middle class than among the poor. an analogy:
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3/ if I buy a dozen eggs and one of them is cracked/rotten, and I buy a dozen onions, and one of them is an egg, then there's a (a) a fair bit of mobility as I toss the bad egg, and move the good egg from onion bag to egg box (b) evidence of bad sorting
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4/ But let us imagine a more efficient, BETTER store that does a 99.99% accurate job of sorting good eggs into egg boxes, and onions into onions bags "grocery mobility" is very low ... because everything is properly sorted to start with
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5/ Now, perhaps you have solid evidence that 85 IQ parents in the ghetto (a) often have 150 IQ children (b) do a great job of raising those children, reading to them, teaching them the value of study over short term hedonism if so, then we would hope for high economic mobility
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6/ Is this the case? Do 85 IQ parents tend to have genius children at same rate that married couples with a 150 average IQ do? Do parents who work 20 hours/week at Dollar General, or fake a disability so their welfare checks will pay for cigarettes give their kids good memes?
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7/ I'm open to this hypothesis! Perhaps there's some data out there on intensive early interventions? https://twitter.com/gamingbus/status/1163933016454045696 …
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I'd kick the tires a bit on the interactions between two and three, and ask is this descriptive or normative? How much of this goes toward Yale filtering for students that'd take a rubber stamp and will give it back the most money, and how much of it for education?
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