Patrick Sharkey

Durable effects of concentrated disadvantage on verbal ability among African-American children

Disparities in verbal ability, a major predictor of later life outcomes, have generated widespread debate, but few studies have been able to isolate neighborhood-level causes in a developmentally and ecologically appropriate way. This study presents longitudinal evidence from a large-scale study of >2,000 children ages 6–12 living in Chicago, along with their caretakers, who were followed wherever they moved in the U.S. for up to 7 years. African-American children are exposed in such disproportionate numbers to concentrated disadvantage that white and Latino children cannot be reliably compared, calling into question traditional research strategies assuming common points of overlap in ecological risk. We therefore focus on trajectories of verbal ability among African-American children, extending recently developed counterfactual methods for time-varying causes and outcomes to adjust for a wide range of predictors of selection into and out of neighborhoods. The results indicate that living in a severely disadvantaged neighborhood reduces the later verbal ability of black children on average by ≈ 4 points, a magnitude that rivals missing a year or more of schooling.

Neighborhood selection and the social reproduction of concentrated racial inequality

In this paper, we consider neighborhood selection as a social process central to the reproduction of racial inequality in neighborhood attainment. We formulate a multilevel model that decomposes multiple sources of stability and change in longitudinal trajectories of achieved neighborhood income among nearly 4,000 Chicago families followed for up to seven years wherever they moved in the United States. Even after we adjust for a comprehensive set of fixed and time-varying covariates, racial inequality in neighborhood attainment is replicated by movers and stayers alike. We also study the emergent consequences of mobility pathways for neighborhood-level structure. The temporal sorting by individuals of different racial and ethnic groups combines to yield a structural pattern of flows between neighborhoods that generates virtually nonoverlapping income distributions and little exchange between minority and white areas. Selection and racially shaped hierarchies are thus mutually constituted and account for an apparent equilibrium of neighborhood inequality.

The Intergenerational Transmission of Context

This article draws on the extensive literature on economic and social mobility in America to examine intergenerational contextual mobility, defined as the degree to which inequalities in neighborhood environments persist across generations. PSID data are analyzed to reveal remarkable continuity in neighborhood economic status from one generation to the next. The primary consequence of persistent neighborhood stratification is that the racial inequality in America’s neighborhoods that existed a generation ago has been transmitted, for the most part unchanged, to the current generation. More than 70% of black children who grow up in the poorest quarter of American neighborhoods remain in the poorest quarter of neighborhoods as adults, compared to 40% of whites. The results suggest that racial inequality in neighborhood economic status is substantially underestimated with short‐term measures of neighborhood income or poverty and, second, that the steps taken to end racial discrimination in the housing and lending markets have not enabled black Americans to advance out of America’s poorest neighborhoods.

THE LEGACY OF DISADVANTAGE: MULTIGENERATIONAL NEIGHBORHOOD EFFECTS ON COGNITIVE ABILITY

This study examines how the neighborhood environments experienced over multiple generations of a family influence childrens cognitive ability. Building on recent research showing strong continuity in neighborhood environments across generations of family members, the authors argue for a revised perspective on “neighborhood effects” that considers the ways in which the neighborhood environment in one generation may have a lingering impact on the next generation. To analyze multigenerational effects, the authors use newly developed methods designed to estimate unbiased treatment effects when treatments and confounders vary over time. The results confirm a powerful link between neighborhoods and cognitive ability that extends across generations. A familys exposure to neighborhood poverty across two consecutive generations reduces child cognitive ability by more than half a standard deviation. A formal sensitivity analysis suggests that results are robust to unobserved selection bias.

The acute effect of local homicides on children's cognitive performance

This study estimates the acute effect of exposure to a local homicide on the cognitive performance of children across a community. Data are from a sample of children age 5–17 y in the Project on Human Development in Chicago Neighborhoods. The effect of local homicides on vocabulary and reading assessments is identified by exploiting exogenous variation in the relative timing of homicides and interview assessments among children in the same neighborhood but assessed at different times. Among African-Americans, the strongest results show that exposure to a homicide in the block group that occurs less than a week before the assessment reduces performance on vocabulary and reading assessments by between ∼0.5 and ∼0.66 SD, respectively. Main results are replicated using a second independent dataset from Chicago. Findings suggest the need for broader recognition of the impact that extreme acts of violence have on children across a neighborhood, regardless of whether the violence is witnessed directly.

The Effect of Local Violence on Children’s Attention and Impulse Control

OBJECTIVES We examined whether the burden of violence in a childs community environment alters the childs behavior and functioning in the classroom setting. METHODS To identify the effects of local violence, we exploited variation in the timing of local homicides, based on data from the Chicago Police Department, relative to the timing of interview assessments conducted as part of a randomized controlled trial conducted with preschoolers in Head Start programs from 2004-2006, the Chicago School Readiness Project. We compared childrens scores when exposed to recent local violence with scores when no recent violence had occurred to identify causal effects. RESULTS When children were assessed within a week of a homicide that occurred near their home, they exhibited lower levels of attention and impulse control and lower preacademic skills. The analysis showed strong positive effects of local violence on parental distress, providing suggestive evidence that parental responses may be a likely pathway by which local violence affects young children. CONCLUSIONS Exposure to homicide generates acute psychological distress among caregivers and impairs childrens self-regulatory behavior and cognitive functioning.

Survival and Death in New Orleans: An Empirical Look at the Human Impact of Katrina

Hurricane Katrina has been interpreted as both a “metaphor” for the racial inequality that characterizes urban America and as a purely “natural” disaster that happened to strike a predominantly Black city. To resolve these conflicting interpretations, the author analyzes data on New Orleans residents who died during Katrina in an effort to provide an empirical look at the groups most directly affected by the hurricane. Contrary to prior reports in the popular press, the author finds that the impact of the storm was felt most acutely by the elderly population in New Orleans and by Blacks, who were much more likely to die than would be expected given their presence in the population. Data on the locations of recovered bodies also show that Katrina took its largest toll in New Orleans’s Black community. These findings confirm the impression that race was deeply implicated in the tragedy of Katrina.

Spatial segmentation and the black middle class.

Ethnographic studies of the black middle class focus attention on the ways in which residential environments condition the experiences of different segments of the black class structure. This study places these arguments in a larger demographic context by providing a national analysis of neighborhood inequality and spatial inequality of different racial and ethnic groups in urban America. The findings show that there has been no change over time in the degree to which majority-black neighborhoods are surrounded by spatial disadvantage. Predominantly black neighborhoods, regardless of socioeconomic composition, continue to be spatially linked with areas of severe disadvantage. However, there has been substantial change in the degree to which middle- and upper-income African-American households have separated themselves from highly disadvantaged neighborhoods. These changes are driven primarily by the growing segment of middle- and upper-income African-Americans living in neighborhoods in which they are not the majority group, both in central cities and in suburbs.

Temporary Integration, Resilient Inequality: Race and Neighborhood Change in the Transition to Adulthood

This article focuses on neighborhood and geographic change arising with the first “selection” of an independent residential setting: the transition out of the family home. Data from two sources—the Project on Human Development in Chicago Neighborhoods, and the Panel Study of Income Dynamics—are used to provide complementary analyses of trajectories of change in geographic location and neighborhood racial and economic composition during young adulthood. Findings indicate that for young adults who originate in segregated urban areas and remain in such areas, the period of young adulthood is characterized by continuity in neighborhood conditions and persistent racial inequality from childhood to adulthood. For young adults who exit highly segregated urban areas, this period is characterized by a substantial leveling of racial inequality, with African Americans moving into less-poor, less-segregated neighborhoods. However, the trend toward racial equality in young adulthood is temporary, as the gaps between whites and blacks grow as the young adults move further into adulthood. Crucial to the reemergence of racial inequality in neighborhood environments is the process of “unselected” change, or change in neighborhood conditions that occurs around young adults after they move to a new neighborhood environment.

An Alternative Approach to Addressing Selection Into and Out of Social Settings Neighborhood Change and African American Children’s Economic Outcomes

This article develops a method to estimate the impact of change in a particular social setting, the residential neighborhood, that is designed to address nonrandom selection into a neighborhood and nonrandom selection out of a neighborhood. Utilizing matching to confront selection into neighborhood environments and instrumental variables to confront selection out of changing neighborhoods, the method is applied to assess the effect of a decline in neighborhood concentrated disadvantage on the economic fortunes of African American children living within changing neighborhoods. Substantive findings indicate that a decline in neighborhood concentrated disadvantage during childhood leads to increases in adult earnings and income, but has no effects on educational attainment or other social outcomes.