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1. Environmental inequality and disparities in school readiness: The role of neurotoxic lead

   https://doi.org/10.1111/cdev.13949  

   Schachner, Jared_N; Wodtke, Geoffrey_T (December 2023, Child Development)

   Abstract Developmental science has increasingly scrutinized how environmental hazards influence child outcomes, but few studies examine how contaminants affect disparities in early skill formation. Linking research on environmental inequality and early childhood development, this study assessed whether differences in exposure to neurotoxic lead explain sociodemographic gaps in school readiness. Using panel data tracking a representative sample of 1266 Chicago children (50% female, 16% White, 30% Black, 49% Hispanic, μ  age = 5.2 months at baseline, collected 1994–2002), analyses quantified the contribution of lead contamination to class and racial disparities in vocabulary skills and attention problems at ages 4 and 5. Results suggested that lead contamination explains 15%–25% and 33%–66% of the disparities in each outcome, respectively, although imprecise estimates preclude drawing firm inferences about attention problems. 

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2. The Enduring Neighborhood Effect, Everyday Urban Mobility, and Violence in Chicago

   Sampson, Robert J.; Levy, Brian L. (July 2022, The University of Chicago law review)

   A longstanding tradition of research linking neighborhood disadvantage to higher rates of violence is based on the characteristics of where people reside. This Essay argues that we need to look beyond residential neighborhoods to consider flows of movement throughout the wider metropolis. Our basic premise is that a neighborhood’s well-being depends not only on its own socioeconomic conditions but also on the conditions of neighborhoods that its residents visit and are visited by—connections that form through networks of everyday urban mobility. Based on the analysis of large-scale urban-mobility data, we find that while residents of both advantaged and disadvantaged neighborhoods in Chicago travel far and wide, their relative isolation by race and class persists. Among large U.S. cities, Chicago’s level of racially segregated mobility is the second highest. Consistent with our major premise, we further show that mobility-based socioeconomic disadvantage predicts rates of violence in Chicago’s neighborhoods beyond their residence-based disadvantage and other neighborhood characteristics, including during recent years that witnessed surges in violence and other broad social changes. Racial disparities in mobility-based disadvantage are pronounced—more so than residential neighborhood disadvantage. We discuss implications of these findings for theories of neighborhood effects on crime and criminal justice contact, collective efficacy, and racial inequality. 

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3. Effects of the physical and social environment on youth cognitive performance

   https://doi.org/10.1002/dev.22258  

   Meredith, Wesley J.; Cardenas‐Iniguez, Carlos; Berman, Marc G.; Rosenberg, Monica D. (March 2022, Developmental Psychobiology)

   Abstract Individual differences in children's cognitive abilities impact life and health outcomes. What factors influence these individual differences during development? Here, we test whether children's environments predict cognitive performance, independent of well‐characterized socioeconomic effects. We analyzed data from 9002 9‐ to 10‐year olds from the Adolescent Brain Cognitive Development Study, an ongoing longitudinal study with community samples across the United States. Using youth‐ and caregiver‐report questionnaires and national database registries (e.g., neighborhood crime, walkability), we defined principal components summarizing children's home, school, neighborhood, and cultural environments. In two independent samples (ns = 3475, 5527), environmental components explained unique variance in children's general cognitive ability, executive functioning, and learning/memory abilities. Furthermore, increased neighborhood enrichment was associated with an attenuated relationship between sociodemographics and general cognitive abilities. Thus, the environment accounts for unique variance in cognitive performance in children and should be considered alongside sociodemographic factors to better understand brain functioning and behavior across development. 

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4. Does Parental Migration During Childhood Affect Children's Lifetime Educational Attainment? Evidence From Mexico

   https://doi.org/10.1215/00703370-9411336  

   Wassink, Joshua Thomas; Viera, Janelle Ashley (September 2021, Demography)

   Abstract Existing scholarship reveals important and competing influences of parental migration on children's educational trajectories. On the one hand, in the short term, left-behind children commonly take on additional housework and sometimes place less emphasis on education if they aspire to follow in their parents' migratory footsteps. On the other hand, parental migration often leads to monetary transfers (remittances), which reduces financial pressure on sending households and can strengthen educational aspirations among children left behind. Because previous studies examined these effects on children still completing their educations, the cumulative impact of parental migration on children's educational attainment remains uncertain. In this study, we use retrospective life history data from the Mexican Migration Project to link parental migrations occurring during childhood with children's educational attainment measured in adulthood. Using a novel counterfactual approach, we find that parental migration during childhood is associated with increased years of schooling and higher probabilities of completing lower-secondary school, entering upper-secondary school, and completing upper-secondary school. These associations were strongest among children whose parents did not complete primary school and those living in rural areas. Results from a placebo test suggest that these positive associations cannot be attributed to unobserved household characteristics related to parental migration, which supports a causal interpretation of our main findings. Thus, our analysis suggests that, on average, and particularly among more-disadvantaged households, the long-term educational benefits associated with parental migration outweigh short-term disruptions and strain associated with parental absence. 

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5. Exposure density and neighborhood disparities in COVID-19 infection risk

   https://doi.org/10.1073/pnas.2021258118  

   Hong, Boyeong; Bonczak, Bartosz J.; Gupta, Arpit; Thorpe, Lorna E.; Kontokosta, Constantine E. (March 2021, Proceedings of the National Academy of Sciences)

   null (Ed.)

   Although there is increasing awareness of disparities in COVID-19 infection risk among vulnerable communities, the effect of behavioral interventions at the scale of individual neighborhoods has not been fully studied. We develop a method to quantify neighborhood activity behaviors at high spatial and temporal resolutions and test whether, and to what extent, behavioral responses to social-distancing policies vary with socioeconomic and demographic characteristics. We define exposure density ( E x ρ ) as a measure of both the localized volume of activity in a defined area and the proportion of activity occurring in distinct land-use types. Using detailed neighborhood data for New York City, we quantify neighborhood exposure density using anonymized smartphone geolocation data over a 3-mo period covering more than 12 million unique devices and rasterize granular land-use information to contextualize observed activity. Next, we analyze disparities in community social distancing by estimating variations in neighborhood activity by land-use type before and after a mandated stay-at-home order. Finally, we evaluate the effects of localized demographic, socioeconomic, and built-environment density characteristics on infection rates and deaths in order to identify disparities in health outcomes related to exposure risk. Our findings demonstrate distinct behavioral patterns across neighborhoods after the stay-at-home order and that these variations in exposure density had a direct and measurable impact on the risk of infection. Notably, we find that an additional 10% reduction in exposure density city-wide could have saved between 1,849 and 4,068 lives during the study period, predominantly in lower-income and minority communities. 

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