CHANGES IN RACIALLY-MIXED URBAN NEIGHBORHOODS, 1970-1980

研究的目的是记录和解释发生在 1970年到1980年的种族混合城市社区。 尽管他们 理论和政策的重要性，种族混合地区只吸引了 社会科学家的偶然兴趣。 这种忽视可以追溯到 这种信念--建立在继承和“小费”等概念之上-- 种族融合是一种罕见的暂时现象。 此外，关于混合或综合社区的证据确实存在， 已经过时，方法上也有局限。 为了更好地了解种族混合社区如何以及为什么会发生变化， 计划进行多阶段、多层次的分析。 在第一阶段，人口普查 将收集所有区域的种族人口数据， 1970年，美国60个中心城市的种族混合构成 在1970年或1980年有25万或更多的居民。 该人群 的片段（N = 2500）将用于解决有关 1970年混合社区的发生率和种族变化的类型 在接下来的十年里，他们经历了。 分析的第二阶段检查的先行词和伴随词 第一阶段描述的模式。 经过系统的抽样调查， 1000例病例来自混合区的人群， 详细的数据收集，多变量技术将被用来测试 关于1970年区级特征的替代假设， 预测种族组成变化的方向和幅度， 从1970年到1980年。 这一阶段的另一项主要任务是 涉及对非种族人口和住房趋势的评估 伴随着社区种族构成的变化。 在研究的最后阶段，更大的城市背景的作用 将从三个方面进行探讨。 首先，进行的跟踪级分析 在前面的阶段中，将对混合邻域的子组重复 按选定的城市结构特征分类。 二是同一 结构特征将作为预测因子，沿着道 变量，在一个跨层次的分析邻里的变化。 最后， 将进行总体水平回归，以确定哪些维度 城市结构的变化解释了城市之间的差异（N = 60）， 表现出不同类型种族的混合社区的比例 1970年至1980年期间的变化和这种变化的幅度。

The purpose of the research is to document and explain changes occurring in racially-mixed urban neighborhoods from 1970 to 1980. Despite their theoretical and policy importance, racially-mixed areas have attracted only incidental interest from social scientists. This neglect can be traced to the belief--founded on concepts such as succession and "tipping"--that racial integration constitutes an infrequent, temporary phenomenon. Moreover, the evidence on mixed or integrated neighborhoods that does exist is out of date and methodologically limited. To better understand how and why racially-mixed neighborhoods change, a multi-stage, multi-level analysis is planned. In the first stage, census data on population by race will be collected for all tracts exhibiting mixed racial compositions in 1970 and located in the 60 U.S. central cities with 250,000 or more inhabitants in either 1970 or 1980. This population of tracts (N = 2500) will be used to address descriptive issues concerning the incidence of mixed neighborhoods in 1970 and the types of racial change experienced by them over the ensuing decade. The second stage of the analysis examines antecedents and concomitants of the patterns described in the first stage. After a systematic sample of 1000 cases has been drawn from the population of mixed tracts and more detailed data assembled, multi-variate techniques will be employed to test alternative hypotheses about the 1970 tract-level characteristics that predict the direction and magnitude of racial compositional change in these neighborhoods from 1970 to 1980. The other major task during this stage involves an assessment of the non-racial demographic and housing trends that accompany changes in neighborhood racial composition. In the last stage of the research, the role of the larger urban context will be explored in three ways. First, the tract-level analyses performed in prior stages will be repeated for subgroups of mixed neighborhoods categorized by selected urban structural characteristics. Second, the same structural characteristics will serve as predictors, along with tract variables, in a cross-level analysis of neighborhood change. Finally, aggregate-level regressions will be preformed to determine which dimensions of urban structure explain variation across cities (N = 60) in the proportions of mixed neighborhoods exhibiting different types of racial change and in the magnitude of such changes for the period 1970-80.