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Discordant Pair
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Journal Article
Demography (2010) 47 (2): 327–343.
Published: 01 May 2010
...), given that the other twin is affected. Pairwise concordance (Ppw) measures the proportion of concordant (both twins are affected) pairs in all pairs with at least one twin who is affected. Twins may be concordant or discordant on some characteristic of interest: in this case, autism. Let nc...
Journal Article
Demography (2020) 57 (4): 1513–1541.
Published: 21 July 2020
... attainment is associated with mortality among pairs of twins that are concordant (or mostly concordant) with respect to these endowments but discordant with respect to their educational attainment, the association is (conditional on several identifying assumptions) less likely to be spurious. All shared...
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Includes: Supplementary data
Journal Article
Demography (2011) 48 (4): 1517–1533.
Published: 16 August 2011
... period ( b = 0.507, p < .014). A similar association can be seen in a comparison of the coefficients for differences in education across the periods. On average, educational discordance is negatively associated with duration of desistence for the second member of the pair ( b = –0.014, p...
FIGURES
Journal Article
Demography (2013) 50 (4): 1399–1420.
Published: 24 January 2013
.... The numbers of concordant and discordant MZ and DZ twin pairs (in terms of education/fertility) and the tetrachoric correlations of MZ and DZ (for education/fertility) twin pairs are shown in Table 3 . A greater proportion of MZ than DZ twin pairs was concordant for both education and fertility...
Journal Article
Demography (2024) 61 (5): 1339–1350.
Published: 01 October 2024
... at the University of Wisconsin–Madison, funded by NIA Center Core Grant P30 AG017266. 1 Because we identified individuals as siblings with genetic data and not direct survey responses, we use the term “co-sibling.” In fact, some of the sibling pairs could be parent/child pairs with misreported ages...
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Journal Article
New Evidence of Skin Color Bias and Health Outcomes Using Sibling Difference Models: A Research Note
Demography (2019) 56 (2): 753–762.
Published: 09 January 2019
... . McQueen , M. B. , Boardman , J. D. , Domingue , B. D. , Smolen , A. , Tabor , J. , Killeya-Jones , L. , . . . Harris , K. M. ( 2015 ). The National Longitudinal Study of Adolescent to Adult Health (Add Health) sibling pairs genome-wide data . Behavior Genetics , 45 , 12...
Includes: Supplementary data
Journal Article
Demography (2015) 52 (3): 919–942.
Published: 23 April 2015
... bias) of a partnership between men with attribute i and women with attribute j from what we would expect if sexual mixing were random—that is, proportional to population composition. This coefficient is equal to the ratio of observed pairings between men with attribute i and women with attribute...
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Journal Article
Demography (2007) 44 (1): 113–135.
Published: 01 February 2007
... as a mea- sure of monotonicity, is measured by the proportion of concordant changes from one value in one variable to paired values in the other variable. The sum of the concordances (C ) minus the sum of the discordances (D) is the numerator. The sum of the concordances and the discordances, or the total...
Journal Article
Demography (2021) 58 (2): 571–602.
Published: 01 April 2021
... frequencies under the independence assumption (i.e., the product of the marginal distributions for husbands and wives). 11 Kendall’s tau is a measure of rank correlation, given by the difference between the number of concordant and discordant pairs of couples relative to the total number of pairs...
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Includes: Supplementary data
Journal Article
Demography (2015) 52 (1): 61–82.
Published: 14 January 2015
... and child survival, what should be done? We do not believe that studying siblings who are discordant on wantedness offers an adequate solution. The birth of the unwanted member of a sibling pair would still occur due to unobservable advantages and disadvantages that apply only to the unwanted child...
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Journal Article
Demography (1983) 20 (2): 129–145.
Published: 01 May 1983
...- bearing interval such that the cumulative distributions of these assigned intervals approximated the cumulative distribu- tions of the corresponding separation intervals." (Each pair of time distribu- tions was tested for statistically signifi- cant differences; in none of the study intervals...
Journal Article
Demography (2016) 53 (4): 1185–1205.
Published: 21 July 2016
... pairs in our sample in order to eliminate any confounding effects of gender differences. We examine the samples of twins in all families versus in multiracial families separately because the race labeling of twins in multiracial families has a higher chance of discordance in the racial labeling of twins...
Journal Article
Demography (1992) 29 (2): 265–285.
Published: 01 May 1992
.... In addition, I conducted matched-pair t-tests using the 338 husbands and wives. Again, the results were essentially the same, suggesting that little would be gained by restricting the sample so that matched-pair t-tests could be reported. These two findings justified the inclusion of the native-born spouses...
Journal Article
Demography (1999) 36 (2): 195–203.
Published: 01 May 1999
.... “PSID Analysis of Matched Pairs of Ex-Spouses: The Relation of Economic Resources and New Family Obligations to Child Support Payments.” Report to the Department of Health and Human Services—ASPE, November. Hill , M.S. ( 1992 ). The Role of Economic Resources and Remarriage in Financial...
Journal Article
Demography (2009) 46 (1): 85–101.
Published: 01 February 2009
... structure. Table 3 focuses on the types of boundary ambiguity that occur among those adolescent- mother pairs in which the adolescent, the mother, or both reported living in a cohabiting stepfamily (N = 831). There is a very high level of discord in reports about cohabiting stepfamilies; only 30...
Journal Article
Demography (2016) 53 (4): 1135–1168.
Published: 08 July 2016
.... Because the twin fixed-effects design effectively exploits variation in schooling and mortality within twin pairs, it is crucial to have a large enough number of discordant twin pairs along these dimensions (see Boardman and Fletcher 2015 ). We use information on death dates to measure mortality...
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Journal Article
Demography (2000) 37 (3): 285–298.
Published: 01 August 2000
... as some mothers excel more at mothercraft than others, this would be read into a behavior genetic model as a shared environ- mental effect. The term nonshared environment refers to environmen- tal effects that are unique to a particular child and uncor- related across pairs of biological relatives...
Journal Article
Demography (2011) 48 (4): 1347–1375.
Published: 13 August 2011
... treatment effects of education when compulsory school laws really matter . American Economic Review , 96 , 152 – 175 . 10.1257/000282806776157641 Osler , M. , McGue , M. , & Christensen , K. ( 2007 ). Socioeconomic position and twins’ health: A life-course analysis of 1266 pairs...
Journal Article
Demography (2024) 61 (6): 1731–1757.
Published: 01 December 2024
.... Of these sibling pairs, 34.5% were discordant on homeownership status. I fit separate ordinary least-squares (OLS) regression models for Black and White men with the full linked sample ( N = 1.4 million) to estimate the unadjusted difference in life expectancy between homeowners and renters. Because...
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Includes: Supplementary data
Journal Article
Demography (2023) 60 (1): 123–145.
Published: 01 February 2023
... better accounts for the problem of tied ranks by taking advantage of the information on concordant and discordant pairs of ranks. Finally, we implement another solution for tied ranks with the polychoric correlation between a couple's nominal educational levels, assuming a latent joint normal...
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Includes: Supplementary data
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