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Surnames and a Theory of Social Mobility - University of Chicago ...

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<strong>of</strong> people with a factor that normally predicts both higher earnings <strong>and</strong> educational<br />

attainment, yet with average attainment in both these respects. This seems a<br />

troubling implication <strong>of</strong> current estimates <strong>of</strong> social mobility for different aspects <strong>of</strong><br />

social status.<br />

In contrast the model <strong>of</strong> one underlying measure <strong>of</strong> social competence that is<br />

suggested here would predict that the families scoring highly on this underlying<br />

measure, the regression to the mean would be the same for all aspects <strong>of</strong> status:<br />

cognitive abilities, non-cognitive abilities, earnings, wealth, education, occupations<br />

<strong>and</strong> longevity. The different rates <strong>of</strong> mobility seen on this individual measures<br />

reflects just how much r<strong>and</strong>om component there is linking them to underlying social<br />

competence.

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