SPACE AND THE MEASUREMENT OF INCOME SEGREGATION

ABSTRACT.  This paper proposes a new spatial ordering index that that can be used to quantify the dependence of a given pattern of income segregation on the spatial arrangement of neighborhoods. Unlike other spatial measures of income segregation proposed in the literature, the spatial ordering index is less sensitive to the presence of outliers, satisfies the "principle of transfers," and is flexible enough to quantify a variety of spatial patterns of segregation. The index can be interpreted in terms of the ratio of two covariances. Properties of the proposed measure are demonstrated using an example from the city of Baltimore, Maryland.     

A NOTE ON NEIGHBORHOOD SIZE AND THE MEASUREMENT OF SEGREGATION INDICES*

This note examines neighborhood segregation measures with respect to size and validity. Conventional measures, while related to within-neighborhood homogeneity, are not necessarily related to neighborhood size. An empirical test examines racial segregation for Baltimore in 1970 and 1980 using both census tract and specially formulated neighborhood aggregates. For both years, and for all measures of segregation, the values and trends are essentially unchanged by the level of aggregation.     

REPRODUCING AND RESHAPING ETHNIC RESIDENTIAL SEGREGATION IN STOCKHOLM: THE ROLE OF SELECTIVE MIGRATION MOVES

This paper deals with the issues of selective migration moves, and the production and reproduction of immigrantdense neighbourhoods in Stockholm, Sweden. It has been shown earlier that selective migration, that is, socioeconomic and ethnic differences between those leaving, entering and staying in so‐called deprived neighbourhoods, reproduces these neighbourhoods' characteristics of being poor and immigrant dense. Key concepts launched to inform such studies and derived from the US segregation discourse are “white fight” and “white avoidance”, meaning that native people (or white people in the US case) tend to leave neighbourhoods experiencing growing numbers of immigrants (black people) and which they also tend to avoid moving into such neighbourhoods. Using a complete set of geo‐coded longitudinal individual data for the 2005–2008 Stockholm County population, this paper contributes to our understanding of ethnic differences in the intra‐urban migration system. Three empirical questions are addressed: what individual characteristics distinguish (1) those who move into neighbourhoods experiencing rapidly increasing immigrant densities from those moving elsewhere in the urban region; (2) those who leave neighbourhoods experiencing rapidly increasing immigrant densities from those who stay put; (3) those who move in the direction of higher immigrant densities from those moving into lower densities? Results from multivariate statistical analyses provide support for the avoidance hypothesis but less support for the fight hypothesis. When controlling for a range of individual and neighbourhood attributes there is clear evidence that native‐born Swedes are less inclined than most immigrant categories to move into immigrant dense areas while ethnic origin does not seem to matter much when explaining who leaves such areas.     

广州市外来人口居住隔离及影响因素研究

利用广州市人口普查街道(部分居委会)数据总结1990-2000年外来人口居住隔离的时空特征:隔离程度呈增加趋势,核心和外围区隔离程度及变化差异大,散点状为主的空间模式,并呈现异质性和非稳定性的社会特征。通过典型社区问卷访谈,对比外来人口与户籍低收入人口,建构影响因素的逻辑回归(Logistic regression)模型,显示户籍的属地差别是产生隔离的根本原因,与户籍属地管理相关的劳动力市场分割和住房政策共同构成了排斥的制度环境,限制了外来人口的住房选择,把其推向低端私人租房市场。在有限的居住选择下,交通和经济等个体择居要素影响了隔离空间的分布和社会特征,以城中村为代表低端私人租房来源的布局特征决定并固化了隔离空间的分布模式。     

上海市区有老人家庭居住需求与居住分异

上海是我国第一个进入老年型人口结构的城市。随着年龄的增长、生理心理状况的变化,老人对住宅的需求有一定的特殊性。居家养老模式下,老人的居住状况直接影响老人晚年的生活质量。以老人与子女居住空间距离为标准,可分为共居型、网络型和分离型三种居住类型。受经济、社会、文化及健康状况的影响,上海市区有老人家庭存在居住地段、住宅类型、住宅环境、社区为老服务等方面的分异。     

TIPPING AND RESIDENTIAL SEGREGATION: A UNIFIED SCHELLING MODEL*

ABSTRACT This paper presents a Schelling‐type checkerboard model of residential segregation formulated as a spatial game. It shows that although every agent prefers to live in a mixed‐race neighborhood, complete segregation is observed almost all of the time. A concept of tipping is rigorously defined, which is crucial for understanding the dynamics of segregation. Complete segregation emerges and persists in the checkerboard model precisely because tipping is less likely to occur to such residential patterns. Agent‐based simulations are used to illustrate how an integrated residential area is tipped into complete segregation and why this process is irreversible. This model incorporates insights from Schelling's two classical models of segregation (the checkerboard model and the neighborhood tipping model) and puts them on a rigorous footing. It helps us better understand the persistence of residential segregation in urban America.     

THE IMPACT OF STATE LAND-USECONTROLS ON RESIDENTIAL LAND VALUES

In this paper, we examine the effects of state land-use controls on the aggregate demand and supply of residential land. Previous studies have examined the effect of land-use regulation on housing prices using single-equation estimation. We estimate a three-equation intejurisdidional supply-demand model of land-use controls. Our results suggest that land-use regulations have a significant impact on both the demand and supply of residentid land as expected.