Fetal Origins of Personality: Effects of early life circumstances on adult personality traits

Sonya Krutikova and Helene Lilleør

No 2015-03, CSAE Working Paper Series from Centre for the Study of African Economies, University of Oxford

Abstract: Personality traits are highly predictive of life outcomes and successes. However, little is known about their formation and what can hamper their development. There is ample evidence that conditions in early-life can have persistent influence on health and cognitive skills. In this paper, we ask whether this is also the case for the formation and development of personality traits. We find strong and robust evidence of persistent impacts among siblings of early-life rainfall fluctuations on measures of a latent personality trait, known as core self-evaluation, in adulthood. The results are driven by females, irrespective of the gender composition of siblings within the household. There is heterogeneity across households likely to have different levels of credit access, suggesting a household wealth mechanism; effects are strongest for households with lowest durable asset holdings. Effects on other outcomes in adulthood suggest that early life rainfall may impact adult core self-evaluation through health, schooling and wealth, although we cannot rule out reverse causality.

Date: 2015
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