Skip Nav Destination
Close Modal
1-20 of 20
Search Results for Fraternal Twin
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
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...
View articletitled, Age at first sexual intercourse, genes, and social context: Evidence from <span class="search-highlight">twins</span> and the dopamine D4 receptor gene
View
PDF
for article titled, Age at first sexual intercourse, genes, and social context: Evidence from <span class="search-highlight">twins</span> and the dopamine D4 receptor gene
Journal Article
Demography (2011) 48 (4): 1517–1533.
Published: 16 August 2011
... population registry, we estimate Cox proportional hazards models that describe similarity in the timing of smoking desistance among adult twin pairs. We show that identical twin pairs are significantly more likely to quit smoking within a similar time frame compared with fraternal twin pairs. Importantly, we...
FIGURES
Journal Article
Demography (1999) 36 (4): 421–428.
Published: 01 November 1999
.... Its practitioners infer the effects of heredity on personality and behavior mainly from studies of pairs of individuals who dif- fer in genetic relatedness (Plomin, DeFries, and McCleam 1990). The most common design is to compare pairs of iden- tical twins with pairs of fraternal twins. The former...
Journal Article
Demography (2010) 47 (2): 327–343.
Published: 01 May 2010
... is a genetic disorder arises from the reported difference in concordance rates for autism in identical and fraternal twin pairs, and a high recurrence risk in siblings. There is no reason to believe that any one of these frameworks is wrong, and there are many reasons to believe that the increased prevalence...
Journal Article
Demography (2001) 38 (3): 437–447.
Published: 01 August 2001
.... Monozygotic (MZ; identical) twins are 100% genetically re- lated; dizygotic (DZ; fraternal) twins, nontwin siblings, and other first-degree relatives have an expected genetic corre- lation equal to roughly half that of monozygotic twins. Simple behavioral genetics models capitalize on the natural experiment...
Journal Article
Demography (2012) 49 (1): 151–174.
Published: 19 January 2012
... of fraternal twins varies, and several risk factors may contribute to an increase in their incidence. 4 In the literature, two concerns are related to using multiple births as an instrument for fertility. First, multiple births have a higher incidence among mothers undergoing fertility treatments and among...
View articletitled, Can We Still Learn Something From the Relationship Between Fertility and Mother’s Employment? Evidence From Developing Countries
View
PDF
for article titled, Can We Still Learn Something From the Relationship Between Fertility and Mother’s Employment? Evidence From Developing Countries
Journal Article
Demography (2017) 54 (1): 71–91.
Published: 09 January 2017
... remained undetected in former investigations. In the current study, the causal effect estimated from the within–identical twins model—and therefore also in the ACE-beta model—is not statistically distinguishable from zero. Only if we pool identical and fraternal twins, which have nearly identical estimates...
FIGURES
View articletitled, Is the Association Between Education and Fertility Postponement Causal? The Role of Family Background Factors
View
PDF
for article titled, Is the Association Between Education and Fertility Postponement Causal? The Role of Family Background Factors
Includes: Supplementary data
Journal Article
Demography (2013) 50 (2): 421–444.
Published: 14 November 2012
... may be mostly fraternal. 16 Identical twins often have perinatal problems (e.g., resulting from sharing the same placenta) that fraternal twins do not have, which often results in lower birth weight in the former. In this study, I focused most of my attention on the preconception environment...
View articletitled, Why Is Infant Mortality Higher in Boys Than in Girls? A New Hypothesis Based on Preconception Environment and Evidence From a Large Sample of <span class="search-highlight">Twins</span>
View
PDF
for article titled, Why Is Infant Mortality Higher in Boys Than in Girls? A New Hypothesis Based on Preconception Environment and Evidence From a Large Sample of <span class="search-highlight">Twins</span>
Journal Article
Demography (2011) 48 (4): 1347–1375.
Published: 13 August 2011
... suggest? To what extent do within–MZ and within–DZ (dyzygotic, or fraternal) twin estimates differ, as they will if individual-specific endowments (as contrasted with common family endowments) are important? The reduced-form relations that we investigate in this study may change with market...
View articletitled, Does More Schooling Reduce Hospitalization and Delay Mortality? New Evidence Based on Danish <span class="search-highlight">Twins</span>
View
PDF
for article titled, Does More Schooling Reduce Hospitalization and Delay Mortality? New Evidence Based on Danish <span class="search-highlight">Twins</span>
Journal Article
Demography (2020) 57 (2): 559–576.
Published: 08 April 2020
... mothers are positively selected with respect to health and health behaviors. However, Farbmacher et al. ( 2018 ) showed that this selection issue is primarily attributable to dizygotic (fraternal) twins. Dizygotic twins become more likely with increasing age of the mother (Fauser et al. 2005 ; Reddy et...
FIGURES
View articletitled, Double Trouble: The Burden of Child-rearing and Working on Maternal Mortality
View
PDF
for article titled, Double Trouble: The Burden of Child-rearing and Working on Maternal Mortality
Includes: Supplementary data
Journal Article
Demography (2010) 47 (1): 145–162.
Published: 01 February 2010
... pairs, the sibling endowment variable is de¿ ned as the twin s endowment and, therefore, these models are unable to estimate the effect of other, nontwin siblings endowments. In twins studies, sibling endowment varies within fraternal twin pairs because they are not genetically identical and remains...
Journal Article
Demography (2010) 47 (2): 393–414.
Published: 01 May 2010
... of identical twins (= 1.00) and fraternal twins (= 0.50). The value for ambiguous siblings represented the average of half and full siblings.2 In addition, because all related kin in these analyses lived in the same household environ- ments for at least part of their childhood and adolescence, common...
Journal Article
Demography (2024) 61 (6): 1731–1757.
Published: 01 December 2024
... as identical twins (siblings and fraternal twins both share on average 50% of genes). This introduces the potential for genetic confounding. In other words, there could be genes associated with both homeownership and longevity that are not accounted for in the analysis using sibling fixed effects. Simply put...
FIGURES
| View All (8)
View articletitled, The Longevity Benefits of Homeownership: Evidence From Early Twentieth-Century U.S. Male Birth Cohorts
View
PDF
for article titled, The Longevity Benefits of Homeownership: Evidence From Early Twentieth-Century U.S. Male Birth Cohorts
Includes: Supplementary data
Journal Article
Demography (2020) 57 (6): 2143–2167.
Published: 25 September 2020
..., mixed-sex twins are fraternal (dizygotic) and share 50% of their genetic material (about the same amount of genetic material that nontwin siblings share). Thus, it is plausible that there are unobservable genetic differences between twins that lead to differential parental care and attention, net...
FIGURES
View articletitled, Gender Discrimination and Excess Female Under-5 Mortality in India: A New Perspective Using Mixed-Sex <span class="search-highlight">Twins</span>
View
PDF
for article titled, Gender Discrimination and Excess Female Under-5 Mortality in India: A New Perspective Using Mixed-Sex <span class="search-highlight">Twins</span>
Includes: Supplementary data
Journal Article
Demography (1997) 34 (1): 31–48.
Published: 01 February 1997
.... For example, Kallman and Sander (1948, 1949) observed a much smaller difference be- tween the life spans of identical (MZ) than of fraternal (DZ) twins. Wyshak (1978) found that correlation coefficients be- tween the life spans of twins not classified by zygosity were Px = .14 for males and Px = .24...
Journal Article
Demography (2009) 46 (4): 695–715.
Published: 01 November 2009
... as an instrument for fertility, wrote that age of menarche is an individual characteristic 10. Sisters are de ned as nontwin full siblings, fraternal twins, identical twins, twins of uncertain zygosity, and half siblings. 11. The variables in the vector Xi include age at Wave I, PPVT score, religiosity, race...
Journal Article
Demography (2010) 47 (Suppl 1): S111–S130.
Published: 01 March 2010
.... , Bathum L. , & Christiansen L. ( 2007 ). Biological Indicators and Genetic Information in Danish Twin and Oldest-Old Surveys . In
M.
Weinstein ,
J.W.
Vaupel , &
K.W.
Wachter (Eds.), Biosocial Surveys (pp. 15 – 41 ). Washington, DC : National Academies Press...
Journal Article
Demography (2012) 49 (4): 1385–1405.
Published: 03 August 2012
.... Griliches ( 1979 ) used adult IQ as a measure of initial endowment to analyze a sample of sibling pairs and found evidence of compensatory investment strategies. Analyzing a sample of adult male twins, Behrman et al. ( 1982 ) showed that concerns regarding how earnings are distributed among children help...
FIGURES
| View All (5)
Journal Article
Demography (2021) 58 (3): 1011–1037.
Published: 01 June 2021
... Economics Letters , 16 , 1489 – 1492 . Anger S. , & Schnitzlein D. D. ( 2017 ). Cognitive skills, non-cognitive skills, and family background: Evidence from sibling correlations . Journal of Population Economics , 30 , 591 – 620 . Baier T. ( 2019 ). Does sibling and twin...
FIGURES
View articletitled, Sibling Similarity in Education Across and Within Societies
View
PDF
for article titled, Sibling Similarity in Education Across and Within Societies
Includes: Supplementary data
Journal Article
Demography (2010) 47 (1): 1–22.
Published: 01 February 2010
... plays in health, the Add Health design included the biological domain from the start by embedding a genetic sample of over 3,000 pairs of adolescents with varying degrees of genetic resemblance, including identical and fraternal twins, full siblings, half siblings, cousins, and adolescents growing up...
