Does higher intelligence mean higher income?

household income

What is the correlation between intelligence and income?  Razib Khan, Gene Expression, used the GSS’s WORDSUM variable to indicate intelligence, which has a ~0.70 correlation with IQ. He used REALINC for income, which is indexed to 1986 values (so it is inflation adjusted) and aggregates the household income.  and then Razib limited his sample to non-Hispanic whites over the age of 30 ( this also limited the data set to respondents from the year 2000 and later).

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