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January 10, 2018

From Harper's:
Humans’ ability to make random choices peaks at age twenty-five.

From The Economist:
In America education and marriage go hand-in-hand, to the extent that marriage rates are now higher among women with PhDs than among women with bachelor’s degrees.

From The Economist:
At the age of 45, the average university-educated American man has led a fairly straightforward personal life. Fully 88% of such men have married, and three-quarters of those are still married to their first wives. Men who did not finish high school are less likely to have married and, if they have, more likely to have divorced ...

From Journal of Abnormal Child Psychology:
Animal experiments and cross-sectional human studies have linked particulate matter (PM) with increased behavioral problems. We conducted a longitudinal study to examine whether the trajectories of delinquent behavior are affected by PM2.5 (PM with aerodynamic diameter ≤ 2.5 μm) exposures before and during adolescence. We used the parent-reported Child Behavior Checklist at age 9–18 with repeated measures every ~2–3 years (up to 4 behavioral assessments) on 682 children from the Risk Factors for Antisocial Behavior Study conducted in a multi-ethnic cohort of twins born in 1990–1995. Based on prospectively-collected residential addresses and a spatiotemporal model of ambient air concentrations in Southern California, monthly PM2.5 estimates were aggregated to represent long-term (1-, 2-, 3-year average) exposures preceding baseline and cumulative average exposure until the last assessment. Multilevel mixed-effects models were used to examine the association between PM2.5 exposure and individual trajectories of delinquent behavior, adjusting for within-family/within-individual correlations and potential confounders. We also examined whether psychosocial factors modified this association. The results sμggest that PM2.5 exposure at baseline and cumulative exposure during follow-up was significantly associated (p < 0.05) with increased delinquent behavior. The estimated effect sizes (per interquartile increase of PM2.5 by 3.12–5.18 μg/m3) were equivalent to the difference in delinquency scores between adolescents who are 3.5–4 years apart in age. The adverse effect was stronger in families with unfavorable parent-to-child relationships, increased parental stress or maternal depressive symptoms. Overall, these findings sμggest long-term PM2.5 exposure may increase delinquent behavior of urban-dwelling adolescents, with the resulting neurotoxic effect aggravated by psychosocial adversities.

From Social Science & Medicine:
The present study showed that gaining access to guns at home was significantly related to increased depressive symptoms among children of gun owners, even after accounting for both observed and unobserved individual characteristics. Both fixed-effects and propensity-score matching models yielded consistent results. In addition, the observed association between in-home firearm access and depression was more pronounced for female adolescents. Finally, this study found suggestive evidence that the perceptions of safety, especially about school (but not neighborhood), are an important mechanism linking in-home firearm access to adolescent depression.

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