From Half Sigma:
The regression analysis in the Dale & Krueger study had a coefficient for the person’s SAT score and a second for the square of the SAT score. Based on these two coefficients, earnings peaks at an SAT score of 1100. People who have an SAT score higher than 1100 earn less money.
Here is the shocking conclusion: in the recent years of the GSS (1991 to 2004), for people whose highest level of educational attainment is a bachelor’s degree, there is a negative correlation between intelligence and income.
Via Overcoming Bias
