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Roberts, Brent W.; Kuncel, Nathan R.; Shiner, Rebecca; Caspi, Avshalom; Goldberg, Lewis R. . (2007). The Power of Personality: The Comparative Validity of Personality Traits, Socioeconomic Status, and Cognitive Ability for Predicting Important Life Outcomes. Perspectives on Psychological Science, 2(4), 313–345. doi:10.1111/j.1745-6916.2007.00047.x 
10.1111/j.1745-6916.2007.00047.x