Sibling Fixed Effects Models Research Articles

Adolescent depressive symptoms and memory performance in young adulthood: Testing critical period, accumulation, and pathway models using a sibling comparison design

RationaleDespite the existing literature connecting depressive symptoms with cognitive function in adulthood, there is limited knowledge about the longitudinal association between depressive symptoms in adolescence and memory function in adulthood, as well as the mechanisms underlying this relationship. ObjectivesThis study aims to determine whether depressive symptoms in adolescence are associated with memory function in young adulthood. To explore the underlying mechanisms of this association, it employs a life course approach, testing the critical period, accumulation, and pathway models. MethodsUtilizing data from the sibling sample of the National Longitudinal Study of Adolescent to Adult Health (Add Health), this study employed sibling fixed effects models to control for unobserved heterogeneity at the family level. To test various life course models, the analysis incorporated adult depressive symptoms, as well as an array of behavioral, psychosocial, and educational mechanism variables. ResultsSibling fixed effects estimates indicated a longitudinal association between depressive symptoms in adolescence and memory function in young adulthood (b = −0.084, p < 0.01). Depressive symptoms in adulthood neither explained nor intensified this association. Mediation analysis revealed that educational attainment modestly accounted for about 11% of the relationship between adolescent depressive symptoms and adult memory function. Combined, these findings lend support to the life course approach, with a specific focus on the critical period model. ConclusionsThis study's findings suggest that depressive symptoms in adolescence are an independent risk factor for memory function in adulthood. The empirical support for the critical period model underscores the importance of implementing early intervention programs and targeted strategies to support adolescents experiencing depressive symptoms.

From classroom to life: Gender differences in the persistent effect of learning disabilities on adult depressive symptoms

Despite the well-established link between adolescent learning disabilities (LD) and mental health, little is known about its long-term consequences. This study examines the relationship between adolescent LD and adult depressive symptoms, with a focus on gender differences and underlying mechanisms. Using a sibling sample from the National Longitudinal Study of Adolescent to Adult Health (N = 3,414), this study estimated sibling fixed effects models to account for unobserved family-level characteristics such as genes and early childhood family and social context. Sobel mediation analyses were conducted to examine social-psychological mechanisms, including the student-teacher relationship, the student-student relationship, and a sense of school belonging. LD in adolescence was positively associated with depressive symptoms in adulthood (b = 0.823, p < 0.05). This association remained robust when controlling for unobserved family-level confounders as well as educational attainment in adulthood. Gender-stratified models showed that only the association for women is statistically significant (b = 1.935, p < 0.05), and its magnitude is nearly three times that of the association for men. Sobel mediation tests indicate that a decline in a sense of school belonging mediates approximately 17% of the association between adolescent LD and adult depressive symptoms. This study's findings suggest that LD in adolescence is associated with an increase in depressive symptoms in adulthood, particularly in women, and a low sense of school belonging may be a potential mediator. Implementing interventions to improve the school integration of girls with LD could be an effective means of improving their long-term mental health.

An analysis of the accuracy of retrospective birth location recall using sibling data

Many surveys ask participants to retrospectively record their location of birth. This paper examines the accuracy of such data in the UK Biobank using a sample of full siblings. Comparison of reported birth locations for siblings with different age gaps allows us to estimate the probabilities of household moves and of misreported birth locations. Our first contribution is to show that there are inaccuracies in retrospective birth location data, showing a sizeable probability of misreporting, with 28% of birth coordinates, 16% of local districts and 6% of counties of birth being incorrectly reported. Our second contribution is to show that such error can lead to substantial attenuation bias when investigating the impacts of location-based exposures, especially when there is little spatial correlation and limited time variation in the exposure variable. Sibling fixed effect models are shown to be particularly vulnerable to the attenuation bias. Our third contribution is to highlight possible solutions to the attenuation bias and sensitivity analyses to the reporting error.

Child health and its effect on adult social capital accumulation.

Although studies have demonstrated important effects of poor health in childhood on stocks of human and health capital, little research has tested economic theories to investigate the effect of child health on social capital in adulthood. Studies on the influence of child health on adult social capital are mixed and have not used sibling fixed effects models to account for unmeasured family and genetic characteristics, that are likely to be important. Using the Add-Health sample, health in childhood was assessed as self-rated health, the occurrence of a physical health condition or mental health condition, while social capital in adulthood was measured as volunteering, religious service attendance, team sports participation, number of friends, social isolation, and social support. We used sibling fixed effects models, which attenuated several associations to non-significance. In sibling fixed effects models there was significant positive effects of greater self-rated health on participation in team sports and social support, and negative effect of mental health in childhood on social isolation in adulthood. These results suggest that children with poor health require additional supports to build and maintain their stock of social capital and highlight further potential benefits to efforts that address poor child health.

Impacts of broadband internet on adolescents’ academic outcomes: heterogeneous effects among lower secondary school students in Norway

ABSTRACT The expansion of internet is likely to influence adolescents’ academic outcomes. Yet, how internet coverage impacts students’ educational performance remains poorly understood. To address this major knowledge gap, this study uses a quasi-experimental approach with Norwegian data to causally examine how the gradual introduction of home broadband internet across municipalities impacted the academic outcomes of lower-secondary school graduates (N = 103,796). Analyses apply sibling fixed-effects models with micro-level registry data from adolescents aged 15–16, and compare differences in effects by gender, social background, migrant status, and academic achievement levels. Findings show that the introduction of broadband internet across municipalities brought moderate grade improvements concentrated among boys in the subject areas of Mathematics, Arts and Crafts, Social Sciences, and Norwegian. The positive effect of broadband internet coverage on academic performance was three times larger for boys than for girls. For boys, broadband internet coverage led to strong grade improvements among the lower-achieving and socioeconomically disadvantaged, and to moderate grade benefits among those of Norwegian background, while boys from higher-achieving and socioeconomically privileged groups reduced their grades moderately. By contrast, for girls, broadband internet coverage worsened substantially the academic performance of those from disadvantaged socioeconomic backgrounds, whereas girls of migrant background obtained higher grades with this expansion of internet. The study findings reveal how the growth of internet coverage impacts adolescent educational performance, but differently across groups, showing a complex intersection across gender, social background, migrant status, and academic achievement levels.

Childhood personality and academic performance: A sibling fixed-effects study.

This study investigated the associations between personality traits at age 8 and academic performance between ages 10 and 14, controlling for family confounds. Many studies have shown links between children's personality traits and their school performance. However, we lack evidence on whether these associations remain after genetic and environmental confounders are accounted for. Sibling data from the Norwegian Mother and Child Cohort Study (MoBa) were used (n = 9701). First, we estimated the overall associations between Big Five personality traits and academic performance, including literacy, numeracy, and foreign language. Second, we added sibling fixed effects to remove unmeasured confounders shared by siblings as well as rating bias. Openness to Experience (between-person β = 0.22 [95% CI: 0.21-0.24]) and Conscientiousness (between-person β = 0.18 [95% CI 0.16-0.20]) were most strongly related to educational performance. Agreeableness (between-person β = 0.06 [95% CI -0.08-0.04]) and Extraversion (between-person β = 0.02 [95% CI 0.00-0.04]) showed small associations with educational performance. Neuroticism had a moderate negative association (between-person β = -0.14 [95% CI -0.15-0.11]). All associations between personality and performance were robust to confounding: the within-family estimates from sibling fixed-effects models overlapped with the between-person effects. Finally, childhood personality was equally predictive of educational performance across ages and genders. Although family background is influential for academic achievement, it does not confound associations with personality. Childhood personality traits reflect unbiased and consistent individual differences in educational potential.

Genetic endowments for social capital: An investigation accounting for genetic nurturing effects

Despite social capital having been shown to be important for health and well-being, relatively little research has examined genetic determinants. Genetic endowments for education have been shown to influence human, financial, and health capital, but few studies have examined social capital, and those conducted have yet to account for genetic nurturing. We used the Add-Health data to study the effect of genetic endowments on individual social capital using the education polygenic score (PGS). We used sibling fixed effects models and controlled for the family environment to account for genetic nurturing. After accounting for the family environment, we found moderately large significant associations between the education PGS and volunteering, but associations with religious service attendance and number of friends were completely attenuated in sibling fixed effects models. These findings highlight that genetic endowments play an important role in influencing volunteering and the importance of accounting for genetic nurturing.

Parental job loss and the role of unemployment duration and income changes for children’s education

Abstract This article studies the impact of parental job loss, subsequent unemployment duration, and income changes on the results of the final exam in lower secondary education and on the decision to pursue an academic track in Denmark. Drawing on administrative register data we use sibling fixed effects models as well as a before-after-test design to investigate the shorter-term effects of parental job loss. The results show that there are hardly any effects of parental job losses on children’s exam results, while we find a reduction in the transition to the academic upper secondary track, both for maternal and paternal job losses. We find no systematic evidence that the negative effects would be larger if the job loss is followed by a longer period of unemployment or by a loss of income, and no evidence for a moderating role of parental education.

Adolescent network positions and memory performance in adulthood: Evidence from sibling fixed effects models with sociometric network data

Although research has explored social factors influencing memory performance during adolescence, the impact of adolescent social network positions remains largely unknown. This study examines whether adolescent network position is associated with memory performance in adulthood, while also considering potential gender differences. The study used a sibling sample from the National Longitudinal Study of Adolescent to Adult Health (N = 2462) and employed sibling fixed effects models to account for unobserved family background factors, such as genetics, parental characteristics, family environment, and childhood neighborhood. Four dimensions of adolescent network position—i.e., popularity, sociality, degree centrality, and closeness centrality—were sociometrically assessed in schools. Memory performance in adulthood was measured using the Rey Auditory Verbal Learning Test. The sibling fixed effects estimates indicate that sociality, degree centrality, and closeness centrality are significantly associated with increased memory performance in adulthood, even after controlling for unobserved family heterogeneity as well as a set of individual-level covariates. In contrast, controlling for unobserved family heterogeneity attenuated the association for popularity, making it statistically insignificant. This study also provides evidence of gender differences in the association between social network position and memory performance. The associations for popularity, sociality, and degree centrality are more pronounced among men than women. This study’s findings highlight the importance of adolescent network positions as social determinants in shaping cognitive outcomes over the life course. Interventions that encourage positive peer interactions and reduce social isolation during adolescence may help improve cognitive health in the population.

Estimating the Influence of Adolescents' Non-Cognitive Skills on Awareness of Social Disaster Responses.

This study examines the influence of 2 noncognitive skills, self-esteem and teamwork, on social disaster response awareness among Korean adolescents. Although self-esteem is a well-established predictor of health-related knowledge, the inclusion of teamwork in this study is motivated by its collective nature and its relevance to social norms. This study used data from the Korean Children and Youth Panel Survey 2018 (KCYPS 2018). Sibling fixed effects models, which account for the common unobserved characteristics shared by siblings within the same family, were estimated. Conventional ordinary least square models showed that both self-esteem and teamwork are significant predictors of social disaster response awareness (bs = .011 and .014, respectively). However, our preferred sibling fixed effects estimates revealed that the controlling for unobserved family-level confounders attenuates the association for self-esteem, rendering it statistically insignificant (b = .003, p = .33). Despite some attenuation, the association between teamwork and social disaster response awareness was robust to controlling for sibling fixed effects (b = .010, p < .001). The study's finding emphasizes the role of students' interpersonal noncognitive abilities in their social disaster response awareness. An intervention aimed at enhancing adolescents' teamwork may be effective to improve their awareness about how to respond to social disasters. Policymakers and practitioners may consider developing social disaster preparedness curricula that highlight the importance of social disaster response measures as community rules or social norms, in addition to safeguarding personal safety.

Number of children and disability pension due to mental and musculoskeletal disorders: A longitudinal register-based study in Norway

Earlier research has documented a relationship between parity and all-cause mortality, as well as parity and cause-specific mortality (e.g. cancer and cardiovascular disease mortality). Less is known about the relationship between parity and two very common (but less deadly) types of disorder: mental and musculoskeletal. We examine the association between parity and risk of disability pensioning from all causes and due to mental or musculoskeletal disorders, using Norwegian register data. In addition to controlling for adult socio-demographic characteristics, we control for unobserved confounding from family background by estimating sibling fixed-effects models. We find a higher risk of disability pensioning among the childless and those with one child than for parents with two children, both for all causes combined and for mental disorders. Childless men and fathers with one child also experience excess risk of being pensioned due to musculoskeletal disorders. For mental disorders, we find a positive association with high parity, particularly for men.

Are upper-secondary track decisions risky? Evidence from Sweden on the assumptions of risk-aversion models

Relative risk aversion (RRA) models explain social class inequalities in education with risk avoidance, i.e., the risky choice assumption (RCA). This assumption concerns risks related to more ambitious educational choices and has been subject to little explicit scrutiny. In this paper, we test whether or not vocational education is a safety net that protects from labor market marginalization. We present an empirical assessment of upper-secondary track choices in Sweden, contrasting the vocational and the academic tracks for those not pursuing tertiary educational degrees. We use Swedish administrative data for all siblings born 1972–1980 and fit sibling fixed effects models netting out unobserved time-constant confounders. The only evidence in favor of the RCA is that when considering selection, graduates of the academic track without a tertiary degree initially face higher risks of not being stably employed and registered as unemployed in their early 20s than their counterparts from vocational education. However, the academic tracks significantly protect men from the threat of entering unskilled routine occupations. We conclude that the support for the RCA is scant at best.

Longitudinal pathways from adolescent depressive symptoms to cardiovascular disease risk in adulthood

RationaleDespite existing literature on the impact of adolescent depressive symptoms on a variety of youth outcomes, little is known about whether and how adolescent depressive symptoms are associated with physical health in adulthood. ObjectiveThis study aimed to investigate the longitudinal association between adolescent depressive symptoms and cardiovascular disease (CVD) risk in adulthood. An extensive list of potential mechanisms underlying this association, including health behaviors, substance use, academic effort and achievement, and school-based relationships, was also examined. MethodsUsing the sibling sample from the National Longitudinal Study of Adolescent to Adult Health (N = 3011), this study employed sibling fixed-effects models to address unobservable family-level confounders, such as genetic factors, parental and familial characteristics, and school and neighborhood environments. ResultsAdolescent depressive symptoms were associated with an increased risk of CVD in about 13 years later (b = 0.698). Sibling fixed-effects estimates revealed that, despite some attenuation (approximately 31%), this association is robust to adjustment for unobserved family-level heterogeneity. Substance use and academic effort/achievement explained about 35% and 16% of the association between adolescent depressive symptoms and adult CVD risk, respectively. In contrast, health behaviors and school-based relationships played little or no role in mediating the association. ConclusionThe findings of this study suggest that policymakers and practitioners may wish to develop interventions to reduce adolescent depressive symptoms and to help adolescents with depressive symptoms avoid substance use and promote effort in school. Early interventions targeting adolescents with depressive symptoms may be a cost-effective strategy for preventing adult physical health problems.

Adolescent sleep duration and cardiometabolic risk in adulthood: Evidence from sibling comparison designs with biomarker data.

Despite the well-established link between sleep patterns and physical health, less is known about whether sleep duration during adolescence is related to physical health in adulthood. This study examines: (a) whether there is an association between sleep duration in adolescence and cardiometabolic risk in adulthood, and (b) whether this association differs by sex. Using data from the National Longitudinal study of Adolescent to Adult Health, this study estimates sibling fixed effects models to account for unobservable family-specific heterogeneity. This study investigates whether sleep duration in adolescence is associated with cardiometabolic risk in adulthood, independently of sleep duration in adulthood. Conventional OLS regression models showed that, compared with individuals who slept 8-9 hr per night during adolescence, those who slept 6 or fewer hours had higher cardiometabolic risk in adulthood (about 13 years later). This was the case for both females and males. Controlling for unobserved family heterogeneity, however, substantially attenuated the association among females, rendering it statistically insignificant. The association for males was robust to controlling for sibling fixed effects. This study also found that the observed association for males is not explained by sleep duration in adulthood. Adolescent sleep duration is associated with cardiometabolic risk in adulthood among males, but not females. A life course approach should be adopted in interventions aiming to reduce cardiovascular disease and diabetes. In particular, this study suggests that a fruitful approach to preventing cardiovascular issues in adulthood includes public health interventions that promote healthy sleeping patterns during adolescence. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Differential exposure to gun or knife violence over two decades is associated with sibling differences in depression.

We tested whether exposure to gun or knife violence over two decades is a cause of depression in young adulthood using data from a nationally representative sample in the United States. The National Longitudinal Study of Adolescent to Adult Health is a sample of 20,745 adolescents, assessed in 1994-95 with follow-ups in 1995-1996 (n = 14,738), 2001-2002 (n = 15,197) and 2007-2008 (n = 15,701; 24 to 32 years old). At each wave, respondents reported exposure to gun or knife violence and symptoms of depression. Regression and sibling fixed effects analyses were conducted to test whether cumulative exposure to gun or knife violence was associated with depression. In fully adjusted models, greater cumulative exposure to gun or knife violence was associated with more symptoms of depression (b = 0.12, 95% C. I. = 0.05; 0.19, p < 0.01) and higher risk for clinically significant depression in young adulthood (OR = 1.07, 95% C. I. = 1.02; 1.13, p < 0.01). Results replicated in sibling fixed effects models (b = 0.21, 95% C. I. = 0.01; 0.42, p < 0.05). These quasi-experimental data suggest that exposure to gun or knife violence is a cause of depression in young adulthood.

Adolescent delinquent behavior and sleep deficiency: a test of multiple mechanisms using sibling comparison designs.

The aim of the study was to investigate the association between adolescent delinquency and sleep deficiency. A comprehensive set of potential mechanisms underlying this association were also examined. Using data from the National Longitudinal Study of Adolescent to Adult Health, the present study employed sibling fixed effects models to account for unobservable family-level confounders, such as genetic predisposition, parenting style, parental ability, and school and neighborhood environments. In Sobel mediation tests, the following mechanism variables were explored: substance use, school-based relationships, and parent-child relationships. An increase in delinquency (measured by the total number of types of delinquent behavior engaged) was associated with an increased risk of sleep deficiency one year later. Sibling fixed effects models with a lagged dependent variable revealed that this association is robust to adjustment for family-level heterogeneity as well as prior sleep deficiency. Substance use was the most salient pathway linking delinquency to sleep deficiency (17% for binge drinking and 26% for marijuana use), followed by student-teacher relationships (17%) and father-child relationships (16%). The results of this study suggest that policymakers and practitioners may consider developing interventions to help delinquent adolescents avoid substance use and restore disruptions of student-teacher and father-child relationships.

Preterm birth and educational disadvantage: Heterogeneous effects

Although preterm birth is the leading cause of perinatal morbidity and mortality in advanced economies, evidence about the consequences of prematurity in later life is limited. Using Swedish registers for cohorts born 1982–94 (N = 1,087,750), we examine the effects of preterm birth on school grades at age 16 using sibling fixed effects models. We further examine how school grades are affected by degree of prematurity and the compensating roles of family socio-economic resources and characteristics of school districts. Our results show that the negative effects of preterm birth are observed mostly among children born extremely preterm (<28 weeks); children born moderately preterm (32–<37 weeks) suffer no ill effects. We do not find any evidence for a moderating effect of parental socio-economic resources. Children born extremely preterm and in the top decile of school districts achieve as good grades as children born at full term in an average school district. Supplementary material for this article is available at: http://dx.doi.org/10.1080/00324728.2022.2080247.

The Effect of Parental Loss on Social Mobility in Early Twentieth-Century Sweden.

Parents are assumed to play a crucial role in the socioeconomic attainment of children. Through investments of both time and resources, they promote the ability, human capital, networks, and motivation of their children to advance socially, or at least to maintain their social position. Consequently, losing a parent in childhood could be detrimental to adult socioeconomic outcomes. We use full-count linked census data and a comprehensive death register to study the effect of parental loss on socioeconomic outcomes in adulthood in Sweden during the first half of the twentieth century. We employ sibling fixed-effects models and the Spanish flu as an exogenous mortality shock to assess the importance of endogeneity bias in associations between parental loss and socioeconomic outcomes. Maternal death led to worse socioeconomic outcomes in adulthood in terms of occupational and class attainment, as well as for social mobility. The effects seem to be causal but the magnitudes were small. For paternal death, we find no consistent pattern, and in most models there was no effect on sons' socioeconomic outcomes. The patterns were similar for sons and daughters and do not support the theory that parental loss had important negative effects on socioeconomic outcomes in adulthood.

Association between a history of clinical depression and dementia, and the role of sociodemographic factors: population-based cohort study.

Depression is associated with an increased dementia risk, but the nature of the association in the long-term remains unresolved, and the role of sociodemographic factors mainly unexplored. To assess whether a history of clinical depression is associated with dementia in later life, controlling for observed sociodemographic factors and unobserved factors shared by siblings, and to test whether gender, educational level and marital status modify the association. We conducted a national cohort study of 1 616 321 individuals aged 65 years or older between 2001 and 2018 using administrative healthcare data. A history of depression was ascertained from the national hospital register in the period 15-30 years prior to dementia follow-up. We used conventional and sibling fixed-effects Cox regression models to analyse the association between a history of depression, sociodemographic factors and dementia. A history of depression was related to an adjusted hazard ratio of 1.27 (95% CI 1.23-1.31) for dementia in the conventional Cox model and of 1.55 (95% CI 1.09-2.20) in the sibling fixed-effects model. Depression was related to an elevated dementia risk similarly across all levels of education (test for interaction, P = 0.84), but the association was weaker for the widowed than for the married (P = 0.003), and stronger for men than women (P = 0.006). The excess risk among men attenuated following covariate adjustment (P = 0.10). This study shows that a history of depression is consistently associated with later-life dementia risk. The results support the hypothesis that depression is an aetiological risk factor for dementia.

Pathways to Skin Color Stratification: The Role of Inherited (Dis)Advantage and Skin Color Discrimination in Labor Markets

Research has uncovered associations between skin color and myriad outcomes. What drives these associations? We develop a theoretical framework that synthesizes the multiple pathways linking skin color with life chances. Skin color stratification should be conceptualized in historical, structural terms: as the result of unequal treatment and inherited (dis)advantage, that is, unequal resources transmitted by families with different skin tones. We assess the role of two pathways— discrimination and inherited (dis)advantage—for Blacks' and Latinos' employment, earnings, and occupational prestige. We use the National Longitudinal Study of Youth 1997, which includes a visual skin color measure; multiple indicators of family background; and a sibling subsample that allows us, using fixed-effects models, to recover the effect of skin color net of family background. First, we find that darker skin tone is associated with worse labor market outcomes. Indicators of family background account for 29 to 44 percent of skin color’s associations with employment, earnings, and occupational prestige. Second, using sibling fixed-effects models, we find that darker skin tone is associated with worse labor market outcomes, but these associations are not statistically significant. In sum, our findings suggest that we pay attention to the multiple pathways linking skin color with life chances.