1. The Republic 1901
2. The validity and utility of selection methods in personnel psychology: Practical and theoretical implications of 85 years of research findings.
3. D. K. Simonton, in Advances in Psychological Research, S. P. Shohov, Ed. (Nova Science, Hauppauge, NY, 2002), vol. 14, pp. 143–153. Note, in Simonton's analysis, the standardized partial beta for relation between intelligence and presidential greatness is 0.29 (the zero-order correlation was 0.55); removing an endogenous predictor (i.e., the number of years in office) increases the beta of intelligence to 0.41.
4. If politicians were selected on ability the correlation between ability and performance would be zero or very weak (given the range restriction in ability).
5. Inferences of Competence from Faces Predict Election Outcomes