Integration involves a trade-off between fertility and status for World War II evacuees

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Lynch , R , Lummaa , V , Panchanathan , K , Middleton , K , Rotkirch , A , Danielsbacka , M , O'Brien , D & Loehr , J 2019 , ' Integration involves a trade-off between fertility and status for World War II evacuees ' , Nature Human Behaviour , vol. 3 , no. 4 , pp. 337-345 . https://doi.org/10.1038/s41562-019-0542-5

Title: Integration involves a trade-off between fertility and status for World War II evacuees
Author: Lynch, Robert; Lummaa, Virpi; Panchanathan, Karthik; Middleton, Kevin; Rotkirch, Anna; Danielsbacka, Mirkka; O'Brien, David; Loehr, John
Contributor: University of Helsinki, University Management
University of Helsinki, University of Turku
University of Helsinki, Lammi Biological Station
Date: 2019-04
Language: eng
Number of pages: 9
Belongs to series: Nature Human Behaviour
ISSN: 2397-3374
URI: http://hdl.handle.net/10138/333664
Abstract: Understanding how refugees integrate into host societies has broad implications for researchers interested in intergroup conflict and for governments concerned with promoting social cohesion. Using detailed records tracking the movements and life histories of Finnish evacuees during World War II, we find that evacuees who intermarry are more likely to be educated, work in professional occupations, marry someone higher in social status and remain in the host community. Evacuees who intermarry before the war have fewer children, whereas those who marry into their host community after the war have more children. These results indicate that life-history and assimilation outcomes depend on key differences between pre-war environments—when migrants are living in their own communities—and post-war environments—when migrants are living in the host community. Overall, this suggests that integration involves a trade-off between reproduction and status such that evacuees who integrate gain social status, whereas those who maintain stronger bonds with their natal communities have higher fertility. We discuss these results within the framework of social capital, intergroup conflict and life-history theory and suggest how they can inform our understanding of evolutionary adaptations that affect tribalism.
Subject: 1181 Ecology, evolutionary biology
IMMIGRANTS
INTERMARRIAGE
ASSIMILATION
COMPETITION
EVOLUTION
DISPERSAL
MIGRATION
PATTERNS
DISTANCE
TRENDS
5144 Social psychology
5141 Sociology
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