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Twins

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Journal Article
Demography (2008) 45 (1): 223–243.
Published: 01 February 2008
... a negative correlation between family size and child outcome, even after we control for the birth order effect. We then instrument family size by the exogenous variation that is induced by a twin birth and find a negative effect of family size on children’s education. We also find that the effect of family...
Journal Article
Demography (2006) 43 (4): 747–769.
Published: 01 November 2006
...Guang Guo; Yuying Tong Abstract We carried out two distinct types of genetic analysis with data from the National Longitudinal Study of Adolescent Health. The first was a non-DNA twin analysis using monozygotic (identical) and same-sex dizygotic (fraternal) twins. The second analysis investigates...
Journal Article
Demography (2016) 53 (4): 1135–1168.
Published: 08 July 2016
...Petter Lundborg; Carl Hampus Lyttkens; Paul Nystedt Abstract By using historical data on about 50,000 twins born in Sweden during 1886–1958, we demonstrate a positive and statistically significant relationship between years of schooling and longevity. This relation remains almost unchanged when...
FIGURES
Journal Article
Demography (2013) 50 (2): 445–446.
Published: 09 March 2013
Journal Article
Demography (2013) 50 (2): 421–444.
Published: 14 November 2012
... and preconception environment by comparing male-female differences in mortality across opposite-sex twins, same-sex twins, and all twins. Using a large sample of twins from sub-Saharan Africa, I find that both preconception environment and child biology increase the mortality of male infants, but the effect...
Journal Article
Demography (2011) 48 (4): 1347–1375.
Published: 13 August 2011
... issue with twins methodology, using rich data from the Danish Twin Registry linked to population-based registries to minimize random and systematic measurement error biases. We find strong, significantly negative associations between schooling and hospitalization and mortality, but generally no causal...
Journal Article
Demography (2016) 53 (4): 1185–1205.
Published: 21 July 2016
... in education are due to racial discrimination or to structural differences in unobserved neighborhood and family characteristics. To address this common data limitation, we use an innovative within-family twin approach that takes advantage of the large sample of Brazilian adolescent twins classified...
Journal Article
Demography (2013) 50 (4): 1399–1420.
Published: 24 January 2013
... examines the association between educational level and completed fertility in a sample of Finnish male and female twins born between 1950 and 1957 with register-based fertility follow-up until 2009. The results show that poorly educated men and highly educated women are least likely to have any children...
Journal Article
Demography (2012) 49 (4): 1453–1477.
Published: 19 July 2012
... different regions within the country. We implement a twin birth instrumental variable approach to the nationally representative 1977–2009 PNAD data. Our results suggest an effect of family size on education that is not uniform throughout a period of significant social, economic, and demographic change...
FIGURES
Includes: Supplementary data
Journal Article
Demography (2020) 57 (4): 1571–1595.
Published: 17 July 2020
... empirical results and has also been widely rejected by theorists of long-run economic growth, where pre-industrial fertility control is integral to most models. In this study, we use the accident of twin births to show that for three Western European–derived pre-industrial populations—namely, England (1730...
FIGURES
Includes: Supplementary data
Journal Article
Demography (2020) 57 (6): 2143–2167.
Published: 25 September 2020
... discrimination processes, we explore the association between child sex and postneonatal under-5 mortality using a sample of mixed-sex twins from four waves of the Indian National Family Health Survey. Mixed-sex twins provide a natural experiment that exogenously assigns a boy and a girl to families at the same...
FIGURES
Includes: Supplementary data
Image
Published: 17 July 2020
Fig. 1 Expected effect of twins on total births More
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Published: 08 April 2020
Fig. 2 Survival rates for mothers with and mothers without twins at first birth More
Journal Article
Demography (2001) 38 (1): 29–42.
Published: 01 February 2001
...Joseph Lee Rodgers; Hans-Peter Kohler; Kirsten Ohm Kyvik; Kaare Christensen Abstract Behavior genetic designs and analyses can be used to address issues of central importance to demography. We use this methodology to document genetic influence on human fertility. Our data come from Danish twin...
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Published: 17 July 2020
Fig. 3 Observed births by parity at twin birth More
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Published: 14 November 2016
Fig. 2 Variation in parental cognitive stimulation within twin pairs (in absolute values). N = 1,000 (500 twin pairs); estimates are calculated on the nonimputed sample. Source: Early Childhood Longitudinal Study, Birth Cohort (ECLS-B) More
Image
Published: 08 April 2020
Fig. 1 Twin rate in Sweden for firstborn children. Statistics are based on the Swedish register data. To compute the monozygotic and dizygotic twinning rates, we apply Weinberg’s ( 1901 ) rule. The vertical lines indicate the period in which more than 99% of the mothers in our sample gave birth More
Journal Article
Demography (2021) 58 (6): 2337–2364.
Published: 01 December 2021
... and Development Review , 37 , 55 – 80 . Nelson M. A. ( 2018 ). ‘ Relieved of these little chores’: Agricultural neighbor labor, family labor, and kinship in the United States 1790–1940 (Doctoral dissertation). Department of History, University of Minnesota , Twin Cities, MN . Nelson M...
FIGURES
Includes: Supplementary data
Image
Published: 25 September 2020
Fig. 1 Results of within mixed-sex twin fixed-effects analyses of the effect of child sex on infant mortality (1–11 months) (left panel) and within mixed-sex twin fixed-effects analyses of the effect of child sex on child mortality (12–59 months) (right panel). The baseline male mortality More
Journal Article
Demography (2022) 59 (5): 1953–1979.
Published: 01 October 2022
FIGURES | View All (5)
Includes: Supplementary data