期刊
POPULATION STUDIES-A JOURNAL OF DEMOGRAPHY
卷 69, 期 2, 页码 -出版社
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.1080/00324728.2015.1056823
关键词
gene-environment interaction; twins; heredity; fertility; reproductive age; age at first birth; heritability; UK
类别
资金
- Dutch Science Foundation (VIDI Innovation Grant) [452-10-012]
- European Research Council Consolidator Grant SOCIOGENOME [ERC-2013-CoG-615603]
- Wellcome Trust
- European Community's Seventh Framework Programme (FP7)
- National Institute for Health Research (NIHR)
- King's College London
Using a sample of monozygotic (945, 42 per cent) and dizygotic (1,329, 58 per cent) twin pairs born 1919-68 in the UK, we applied innovative tobit models to investigate genetic and environmental influences on age at first birth (AFB). We found that a substantial part (40 per cent) of the variation in AFB is caused by latent family characteristics. Genetic dispositions (26 per cent) play a more important role than the shared environment of siblings (14 per cent), with the non-shared environment/measurement error having the strongest influence (60 per cent). Like previous studies, this study reveals marked changes in estimates over time, and supports the idea that environmental constraints (war or economic crisis) suppress and normative freedom (sexual revolution) promotes the activation of genetic predispositions that affect fertility. We show that the exclusion of censored information (i.e., on the childless) by previous studies biased their results. Supplementary material for this article is available at: [GRAPHICS]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据