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This note's aim is to investigate the sensitivity of Christakis and Fowler's claim [Christakis, N., Fowler, J., 2007. The spread of obesity in a large social network over 32 years. The New England Journal of Medicine 357, 370-379] that obesity has spread through social networks. It is well known in the economics literature that failure to include contextual(More)
This study asks two related questions about the shifting landscape of marriage and reproduction in US society over the course of the last century with respect to a range of health and behavioral phenotypes and their associated genetic architecture: (i) Has assortment on measured genetic factors influencing reproductive and social fitness traits changed over(More)
In this paper, I use a nationally representative sample of adolescents from the United States to examine the association between childhood mistreatment (sexual abuse and physical abuse) and depression during adolescence and young adulthood. Researchers have implicated childhood mistreatment as one of the most important predictors of depression. An(More)
Mental health problems represent a potentially important but relatively unexplored factor in explaining human capital accumulation during college. We conduct the first study, to our knowledge, of how mental health predicts academic success during college in a random longitudinal sample of students. We find that depression is a significant predictor of lower(More)
Research has shown that low birth weight is linked to infant mortality as well as longer term outcomes. This paper examines the medium term outcomes that may link low birth weight to adult disadvantage. Results show strong effects on several educational outcomes, including early grade repetition, receipt of special education services, and diagnosis of a(More)
This paper contributes to the literature on the relationship between adolescent depression and educational attainment in several ways. First, while cross-sectional data are normally used, this paper uses longitudinal data in order to defend against the potential of reverse causality. Second, this is the first paper in the literature to control for(More)
One of the most robust relationships in the social sciences is the large positive correlation between health and education, but establishing a causal link remains a substantial challenge. This paper exploits di¤erences in genetic inheritance among children within the same family to estimate the impact of several poor health conditions on academic outcomes.(More)
A national sample of US teenagers combined with a complementary sample of US adults are used to examine the effects of teenage childbearing on health behaviors by comparing female siblings in both the teenage sample and a sample of adults. Additionally, miscarriage information available in the teenage sample is used to form comparison groups. Unlike(More)
This paper uses administrative data from the University of Texas-Austin to examine whether the number of same high school classmates at college entry influences college achievement, measured by grade point average (GPA) and persistence. For each freshman cohort from 1993 through 2003 we calculate the number and ethnic makeup of college freshmen from each(More)
OBJECTIVE To investigate whether "network effects" can be detected for health outcomes that are unlikely to be subject to network phenomena. DESIGN Statistical analysis common in network studies, such as logistic regression analysis, controlled for own and friend's lagged health status. Analyses controlled for environmental confounders. SETTING(More)