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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)
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)
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)
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)
Three inter-related studies examine the construct of problem solving as it relates to the assessment of deficits in higher level outpatients with traumatic brain injury (TBI). Sixty-one persons with TBI and 58 uninjured participants completed measures of problem solving and conceptually related constructs, which included neuropsychological tests,(More)
The objectives of this study were to describe anxiety and depression levels among acoustic neuroma patients; examine differences in anxiety and depression across the acoustic neuroma management options of microsurgery, radiation and observation; and to investigate management, medical and demographic factors that might predict anxiety and depression in this(More)
We are pleased to respond to a request for comments on the utility of identical twins to infer causality with respect to the education and health association. Specifically, we were asked to outline some thoughts on the provocative, though not unprecedented , findings from Amin et al. (2015) who show that cross-sectional correlations between years of(More)