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Despite a proliferation of research on neighborhood effects on health, how neighborhood economic development, in the form of gentrification, affects health and well-being in the USA is poorly understood, and no systematic assessment of the potential health impacts has been conducted. Further, we know little about whether health impacts differ for residents of neighborhoods undergoing gentrification versus urban development, or other forms of neighborhood socioeconomic ascent. We followed current guidelines for systematic reviews and present data on the study characteristics of the 22 empirical articles that met our inclusion criteria and were published on associations between gentrification, and similar but differently termed processes (e.g., urban regeneration, urban development, neighborhood upgrading), and health published between 2000 and 2018. Our results show that impacts on health vary by outcome assessed, exposure measurement, the larger context-specific determinants of neighborhood change, and analysis decisions including which reference and treatment groups to examine. Studies of the health impacts of gentrification, urban development, and urban regeneration describe similar processes, and synthesis and comparison of their results helps bridge differing theoretical approaches to this emerging research. Our article helps to inform the debate on the impacts of gentrification and urban development for health and suggests that these neighborhood change processes likely have both detrimental and beneficial effects on health. Given the influence of place on health and the trend of increasing gentrification and urban development in many American cities, we discuss how future research can approach understanding and researching the impacts of these processes for population health. [ABSTRACT FROM AUTHOR]

The article focuses on the role of lineage in identity formation among Black Americans. If all of those defined racially as black in the United States have only one ancestry that is a meaningful part of their identity and that ancestry is African-American then for all intents and purposes race and ancestry are equivalent in terms of defining this population. The idea that race and ancestry are equivalent for blacks in the U.S. is made possible because the ancestral diversity among blacks has been consistently ignored in the United States in favor of a racial definition of the population, which defines individuals only in terms of their racial identities. The "one drop rule" of racial classification in the United States has operated historically to make the distinction between race and ethnicity for those defined as blacks unimportant. Thus the people defined as blacks for the most part have also been defined as only having African-American ancestries, regardless of the degree of variation in the ancestries of the individuals involved.

This paper examines the influence of surname on how descendants of white European immigrants to the United States, who are of mixed ethnic ancestry, determine their ethnic identification. It is based on 60 in-depth interviews about ethnic identity and family history, conducted with Catholic, suburban later-generation residents of Santa Clara County California and Montgomery County, Pennsylvania (suburbs of San Jose and Philadelphia, respectively). These respondents describe how other people identilS' them using their surname as an indicator of ethnic background as well as how they use surnames to identify others. They continue to use surnames for their own and others' ethnic identifications despite the fact that they are also continually made aware of the ways in which surname is a faulty, and often inaccurate, indicator of ethnic origin. Factors such as intermarriage, name changes and insufficient knowledge of types of surnames undermine the predictive value of surnames for determining ethnic origin. This examination of the day-to-day use of surnames to determine ethnic ancestry shows the discrepancy between the widespread belief that ethnicity is the naming of a fixed, personal, biological trait that is inherited from one's ancestors and the day-to-day evidence that ethnicity is a processual social phenomenon involving change, choice, and movement across ethnic boundaries for the individual. [ABSTRACT FROM AUTHOR]