Intelligence quotient (IQ), grades, and scores on achievement tests are widely used as measures of cognition, yet the … correlations among them are far from perfect. This paper uses a variety of data sets to show that personality and IQ predict grades … tests. IQ is relatively more important in predicting scores on achievement tests. Personality is generally more predictive …

as height, IQ, earnings, and education are significant and similar in magnitude to OLS estimates. Our estimates suggest …

examine the role of school starting age on longer-run outcomes such as IQ scores at age 18, educational attainment, teenage … using scores from IQ tests taken outside of school, at the time of military enrolment, and measured when students are around … effect of starting school younger on IQ scores measured at age 18. In contrast, we find evidence of much larger positive …

in groups of subjects grouped according to their IQ, with those in combined groups. While in combined groups we observe … higher cooperation rates and profits than in separated groups (with consistent gains among lower IQ subjects and relatively … smaller losses for higher IQ subjects), higher IQ subjects become less lenient when they are matched with lower IQ subjects …

intelligence: higher-IQ entrepreneurs are less likely to follow their fathers. Third, an entrepreneur that starts a firm in the …

of cognitive ability like IQ and grades; the important skills that achievement tests miss or mismeasure, and how much …