This paper studies the causal effect of birth spacing (i.e., the age difference between siblings) on personality traits. We use longitudinal data from a large British cohort which has been followed from birth until age 42.

We investigate whether a policy that bases college admission on relative performance can modify the degree of racial or ethnic segregation in high schools by inducing students to relocate to schools with weaker competition.

We test whether adverse childhood experiences – exposure to parental maltreatment and its indirect effect on health – are associated with age 30 personality traits.

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