ABSTRACT
Despite the incurring criticisms leveled against them, some empirical studies support a positive correlation between IQ and income. While the correlation coefficient is often found to be less than 0.5, it may increase with age to some extent (Herrnstein and Murray, 1996; Jensen, 1998). Labor econometricians have shown that a higher IQ causes higher wages (Cawley et al., 1997; Zax and Rees, 2002; Gould, 2005).
