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Movement from bottom to top,from poor to rich,was rare,even movement from poor to middle class was (i) .Statistical analysis of trends in occupation,income,and property ownership, Thernstrom wrote,"yielded rather (ii) conclusions about social mobility in nineteenth-century America.”So we might expect Thernstrom to be suspicious now of claims that differences in class could be (iii) if only the public schools did a better job.
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