西安市贫困空间结构特征与发生机理

以中国西部综合型大城市、老工业基地西安市为例,基于大规模调研数据,采用相对贫困概念和FGT指数研究城市内部微观单元贫困特征的空间分异与形成机理。结果表明,西安市整体的贫困状况较为缓和,贫困覆盖面广,但深度和强度较弱;随着城市圈层扩展,贫困属性呈现出“U”型演化曲线,表现出“高贫困、破碎、混杂—低贫困或非贫困、弱连续、较弱混杂—较低贫困、连续、内部分化、相对均一—较高贫困、相对连续、较强混杂”的演化规律,成熟建成区和新兴扩展区内侧分化区的贫困状况最弱;城市内部已基本发育成熟了旧城衰退型、发展剥夺型、传统工业衰退型、“城中村”型和新增长中心邻近型等5种表征不同贫困主体及户籍、住房等特征的贫困极核。西安城市贫困空间的结构特征是其社会经济发展的阶段性和区域性的集中体现,是在城市宏观社会经济和整体地域结构背景下,各收入阶层在生活成本、就业机会、公共资源、政策导向和社会心理亚文化圈等因素的作用下,通过接替、过滤、自主集聚、排斥隔离和强化等机制重塑城市社会空间的综合表现。     

Spatial Segregation of the Poor in Southern California: A Multidimensional Analysis

Poverty segregation increased in Southern California during the 1990s. A comparison of four indices reflecting various dimensions of segregation (e.g., evenness, concentration, isolation, and clustering) suggests that poor people are increasingly concentrated and isolated. However, cities within the region experienced different levels and types of segregation, with significant changes over time. Regression analysis using 1990 and 2000 census data highlights the role of demographic, economic, and fiscal variables in explaining the changing landscape of poverty. Whereas historically poor and older cities have seen a rise in poverty that translated into an increase in concentration and isolation, newer suburban communities have evolved differently. Cities where poverty has been high and increasing often maintained a high level of clustering and unevenness, but experienced higher levels of concentration and clustering in 2000. In contrast, wealthier cities typically faced a rise in unevenness and clustering as small pockets of poverty population emerged in the midst of high-income neighborhoods.     

Latent sprawl,divided Mediterranean landscapes: urban growth,swimming pools,and the socio-spatial structure of Athens,Greece

Although Mediterranean cities have inherent differences on a local scale, together they offer a kaleidoscopic overview of distinctive morphologies and patterns of socio-spatial segregation. In this study, we explore the distribution of residential swimming pools as indicators of the use of land and water at the metropolitan scale, in relation to recent changes in the socio-spatial structure of a large Mediterranean city (Athens, Greece). Our results indicate a polarized spatial distribution of swimming pools, still considered a luxury affordable only for a minor segment of the Greek population. The analysis highlights the spatial linkages between concentration of residential pools, class segregation and low-density settlements, indicating that the socio-spatial structure of Athens remains characterized by persistent disparities between rich and poor neighborhoods. Comparison with another Mediterranean city (Barcelona) demonstrates the peculiarity of Athens’ recent development as reflected in the fragmented and polarized urban structure. The study provides an alternative reading of recent Mediterranean urban growth by considering pools as a “landmark” for urban sprawl, producing contested landscapes of localized social segregation.     

GEOGRAPHIC CONTEXT AND CONCENTRATED URBAN POVERTY WITHIN THE UNITED STATES

Responding to previous analyses that assume that places are passive recipients of the various macro-level social phenomena associated with concentrated urban poverty, I hypothesize that concentrated urban poverty takes on different forms in different places as a result of how macro-level social phenomena are mediated by locally specific structures. To investigate how concentrated urban poverty takes on different forms in different places, I first decompose the poverty rates of all high-poverty urban neighborhoods in the United States into their race-specific rate and composition effects, and classify high-poverty neighborhoods based on these decomposition values. The results of the analysis demonstrate that poverty in a majority of the high-poverty neighborhoods in the United States is undoubtedly affected by geographically specific processes. For example, within one set of high-poverty neighborhoods, poverty is associated with both the lack of economic opportunity and high rates of class-based residential segregation within mixed-race immigrant ethnic/immigrant enclaves in large gateway cities. A second set of high-poverty neighborhoods, located in the metropolitan areas of the southern United States, has high rates of poverty because of the residential segregation and geographic concentration of poverty-prone African Americans. And lastly, among a third set of tracts, poverty experiences in African American ghettos are linked to declining economic and social opportunities and class-based residential segregation within large manufacturing cities. A set of recommendations for additional research includes addressing how one-size-fits-all anti-poverty public policies should be modified for the specific needs of each type of high-poverty neighborhood. [Key words: context, poverty, segregation, employment, race, ethnicity.]     

POVERTY SEGREGATION IN WEST GERMAN CITIES - THE "AMERICANIZATION" HYPOTHESIS AND ITS EMPIRICAL EVIDENCE

It is generally assumed that the segregation of the poor in German cities is increasing as a result of cumulative polarization processes in a capitalist economy. This has led to the assumption that German cities are increasingly becoming similar to American cities. The idea of an "Americanization" specifically includes the development of the inner-city "poverty ghettos" and their adverse implications for urban social development in general, which is the focus of this paper. Empirical findings based on analyses in five major German cities do not support these assumptions. In particular there is evidence that local businesses can function as a stabilizing factor in high-poverty neighborhoods, which counteracts developments that are associated with American "poverty ghettos." These findings indicate that the significance of poverty segregation is overestimated in the debate on urban social development in Germany. Rather, a conceptualization of urban social development needs to integrate the structure and development of both population and local business at the neighborhood level. [Key words: poverty, segregation, ghetto, local business, Germany.]     

Sydney's Ethnic Geography: New approaches to analysing patterns of residential concentration

Most studies of ethnic residential segregation in Australian cities have used single-measure indices of dissimilarity and segregation, which access the degree of unevenness between two maps. Segregation is a multi-dimensional concept, however, and in this paper we introduce an alternative way of measuring residential concentration which incorporates several of the key dimensions. The procedure is illustrated using birthplace and language-used-at-home data for collection districts in metropolitan Sydney in 1996. Results show no evidence of extreme spatial concentration of ethnic groups.     

转型期城市低收入邻里的类型、特征和产生机制:以南京市为例

本文以南京市为例,检查转型期城市贫困人口的空间分布特征,并着重分析贫困人口集中的低收入邻里的类型、特征及其产生机制。研究表明,转型期我国城市贫困人口的空间分布表现为在邻里或社区层面上的集中。城市贫困人口在邻里层次上的集聚,导致三种类型低收入邻里的产生,包括老城衰退邻里、退化的工人新村和农民工集聚区(城中村)。分析表明,这些低收入邻里的产生源于国家导向的城市发展政策和国家福利住房供应制度,并在住房市场化和房地产导向的城市发展过程中得以强化。基于南京市的实证分析和实地调查,城市贫困人口的空间分布状况和低收入邻里的特征被检查,低收入邻里的产生机制得以验证。     

Rethinking the RECAP: mapping the relational geographies of concentrated poverty and affluence in Lexington,Kentucky

The idea of concentrated poverty has long held a prominent place in understandings of racial and class inequality in American cities. While the spatial concentration of the poor is undoubtedly an important aspect of this story, concentrated poverty research suffers from a number of conceptual and methodological shortcomings. Through a case study of concentrated poverty and affluence in Lexington, Kentucky, this paper draws on relational socio-spatial theory and critical GIS in order to offer a constructive critique of conventional concentrated poverty research. The paper demonstrates that while concentrated poverty and affluence are both on the rise in recent years, concentrated affluence actually represents a more widespread problem within the city. At the same time, the paper visualizes how these processes are fundamentally interconnected and co-produced through property ownership, where the extraction of rents from areas of concentrated poverty works to simultaneously produce areas of concentrated affluence elsewhere in the city.     

基于社会属性的北京市居民居住与就业空间集聚特征

制度转型期,中国城市居民社会空间发生了新的变化,居民居住和就业空间组织也变得更为复杂,并引起了广泛关注。基于2010 年问卷调查数据,采用缓冲区、最近邻层次聚类和Ripley K函数等空间分析方法对北京城市不同社会属性居民的居住和就业空间分布特征进行实证分析。研究发现：① 总体上,北京城市居民居住和就业空间圈层分异明显。在各圈层内部,不同人群的居住和就业空间分布比例亦存在相对差异;职住空间错位程度表明距市中心15 km左右是城市就业功能和居住功能主导地位转化的分界线;职住平衡度整体上呈现出由内圈层到外圈层递减的趋势,但高收入阶层和年轻白领的职住平衡度相对较低。② 不同人群居住与就业空间集聚特征存在明显差异。一般平民居住和就业均呈散点状集聚;年轻打工族居住和就业集聚区域紧邻,主要集聚在四环以内的城市东部区域;高收入阶层居住呈现“小集中、大分散”集聚特征,就业集聚区多集中在四环以内的城市东部和西北部区域;年轻白领居住集聚区呈现城市西部条带状和东部散点状相结合特征,就业集聚区主要在中关村和CBD为中心的两条轴状区域。③ 不同人群居住和就业空间集聚的尺度特征较为相似,呈现随距离增加“先增后减”变化趋势,但距离阈值存在差异。表现为高收入群体居住空间可选范围较小,一般平民就业空间可选范围较小,而年轻白领居住和就业空间可选范围均较大。     

Space and exclusion: does urban morphology play a part in social deprivation?

There is currently a growing interest in the spatial causes of poverty, particularly its persistence. This paper presents methodological innovations that have been developed for investigating the relationship between physical segregation and economic marginalization in the urban environment. Using GIS to layer historical poverty data, contemporary deprivation indexes and space syntax measures of spatial segregation, a multivariate system has been created to enable the understanding of the spatial process involved in the creation and stagnation of poverty areas as well as to analyse the street segment scale of configuration.     

CONTAINMENT AND MISMATCH: GENDER DIFFERENCES IN COMMUTING IN METROPOLITAN LABOR MARKETS

The spatial containment of women relative to men remains a prominent theme in research on women's employment in American cities. Drawing on a dataset for all metropolitan areas in the United States in 1990, this research analyzes the contextual variability of containment effects and the link between localized commutes and the incidence of occupational sex segregation. Women's more localized commutes persist across most of the urban system, with particularly wide differentials in suburban labor markets in proximity to national service and finance centers. Treatment effects models confirm that differences in the extent of local labor markets among women reinforce occupational sex segregation, but the effect varies by mode of travel. Working close to home slightly increases the likelihood of segregation for women with access to private automobiles, suggestive of spatial containment. Among women reliant on bus transportation, spatial mismatch is so severe that even poorly paid secondary jobs require long commutes.     

Visualising 30 Years of Population Density Change in Australia’s Major Capital Cities

ABSTRACT

This study uses a novel spatial approach to compare population density change across cities and over time. It examines spatio-temporal change in Australia’s five most populated capital cities from 1981 to 2011, and documents the established and emerging patterns of population distribution. The settlement patterns of Australian cities have changed substantially in the last 30 years. From the doughnut cities of the 1980s, programs of consolidation, renewal and densification have changed and concentrated population in our cities. Australian cities in the 1980s were characterised by sparsely populated, low density centres with growth concentrated to the suburban fringes. ‘Smart Growth’ and the ‘New Urbanism’ movements in the 1990s advocated higher dwelling density living and the inner cities re-emerged, inner areas were redeveloped, and the population distribution shifted towards increased inner city population densities. Policies aimed at re-populating the inner city dominated and the resultant changes are now visible in Australia’s five most populated capital cities. While this pattern has been reported in a number of studies, questions remain regarding the extent of these changes and how to analyse and visualise them across urban space. This paper reports on a spatial method which addresses the limitations of changing statistical boundaries to identify the changing patterns in Australian cities over time and space.     

基于全国第六次人口普查数据的广州新移民居住分异研究

运用第六次全国人口普查数据,分析当前广州新移民的居住空间分异问题,探讨中国大城市新移民居住空间的整体格局、分异程度及其分异机制,并以此实证中国城市社会空间理论。研究表明：广州新移民的空间分布总体上表现出近郊集中和远郊分散的特征,其中省内新移民较多集中在中心区外围,省外新移民集中分散在远郊。广州新移民与本地常住人口的差异指数为0.48,分异指数为0.46,隔离指数为0.56,超过美国亚裔移民分异的平均水平。此外,各区的分异度水平存在较大差异。机制分析表明,历经30多年的市场化进程,制度因素对新移民聚居区的影响减弱,单位因素对新移民聚居无明显影响,市场因素的作用增强。与西方情况类似,人口和家庭因素对新移民聚居有一定影响,其中年龄因素和婚姻状况是影响新移民聚居的重要因素。总体上,市场化下中国城市新移民的社会隔离正不断转化为明显的空间分异问题。为推进社会融合,应尽快采取社会空间重构措施(如社会规划和社区规划)予以应对。     

中国城市贫困的空间差异特征

本文研究了2007-2011年间中国352个地级及以上城市贫困的空间演化、分布的差异特征。结果显示：近5年来贫困人口总量略有增长,贫困人口分布整体呈现均衡化趋势;从区域看,西部地区的城市贫困人口集聚加剧,贫困加深区较多;从城市看,小城市、资源型城市和少数民族聚居型城市是构成贫困加深区的主要类型。2011年,贫困发生率自东向西逐渐升高,中小城市、资源型城市和少数民族聚居型城市相对拥有更高的贫困发生率。进一步分析,东北地区资源型城市呈现高人均GDP和高贫困发生率的“隐藏性贫困”,西南地区部分少数民族聚居型城市呈现低人均GDP和相对低贫困发生率的“特殊性低贫”。未来国家反贫困政策应该充分考虑城市的区位、资源条件、人口规模和构成特征,重点关注贫困加深地区的中小城市、资源型城市和少数民族聚居型城市,并解决经济发展和贫困之间的特殊关系。     

APARTHEID WITHIN APARTHEID: AN ASSESSMENT OF OFFICIAL INTRA-BLACK SEGREGATION ON THE WITWATERSRAND,SOUTH AFRICA

Apartheid in South Africa operates at several levels, notably in the policies of state partition and urban residential segregation. The Black population of South African cities resides in racially exclusive townships where the various linguistic groupings are further separated as part of the apartheid policy of state partition. The extent to which linguistic segregation has been enforced in the complex Witwatersrand townships is measured in this paper. The policy has been less effective than other forms of urban segregation, suggesting constraints by the inherited township structures and management problems.     

Geographical Publications

Abstract

The purpose of this paper is to examine the geography of poverty in the state of Illinois and to use these empirical results as a basis for classroom discussions and exercises intended to involve students in the current debate on poverty. Although poverty is generally associated with inner city locations, our results indicate that poverty levels are higher in rural areas, particularly those that are not adjacent to metropolitan locations. The prevalence of low-wage employment and the growing number of single-parent families in rural areas are closely linked to increased poverty. Student surveys and the presentation of data were successful in generating discussion among undergraduate students at Western Illinois University. Student comments revealed a high degree of concern about poverty and sensitivity to the circumstances of the poor.     

北京住宅郊区化与就业空间错位

北京从20 世纪80 年代末开始出现郊区化,其住宅郊区化特点尤为突出。北京市住宅郊区化的驱动力与西方城市的郊区化相比既有相似之处又有明显差异,相似之处是：都是城市化水平不断提高与社会进步的必然结果,以及土地有偿使用制度的实施和城市规划的引导; 不同之处在于北京的住宅郊区化是一种被动的郊区化,居民本身并不想离开市区,但是旧城改造与市区内高昂的房价迫使居民不得不到郊区购房。随着住宅郊区化的大规模发展,北京也出现了居住与就业的空间错位问题,这种空间错位虽然与美国郊区化过程中空间错位有许多不同之处,但在本质上是一致的,都是出现居住与就业的空间分离,造成低收入阶层通勤的时间成本与经济成本增加,导致交通拥挤、社会隔离等社会问题。     

APARTHEID WITHIN APARTHEID: AN ASSESSMENT OF OFFICIAL INTRA-BLACK SEGREGATION ON THE WITWATERSRAND,SOUTH AFRICA

Apartheid in South Africa operates at several levels, notably in the policies of state partition and urban residential segregation. The Black population of South African cities resides in racially exclusive townships where the various linguistic groupings are further separated as part of the apartheid policy of state partition. The extent to which linguistic segregation has been enforced in the complex Witwatersrand townships is measured in this paper. The policy has been less effective than other forms of urban segregation, suggesting constraints by the inherited township structures and management problems.     

中国大城市低收入邻里及其居民的贫困集聚度和贫困决定因素

基于2007 年在中国6 个大城市开展的大规模家庭户调查,采用FGT指数法和逻辑回归分析方法,探讨中国大城市低收入邻里及其居民的贫困集聚程度和决定因素。研究发现,老城衰败邻里的贫困集聚度最高,同时承受多重不利状况的下岗/失业人员的贫困集聚度也是最高;事实贫困、被剥夺感与社会福利分配之间存在不匹配现象。在贫困的决定因素方面,制度保障和市场薪酬对城市贫困的发生具有同等重要的作用,但对不同低收入邻里和不同社会群体又表现出不同的关联性。随着市场作用的加强,市场薪酬机制正在成为贫困产生的更为重要的决定性因素。     

北京城市老年贫困人口识别与空间分布

随着中国老龄化程度加深和城镇化水平的提高,城市地区的老年贫困问题日渐突出。由于缺乏明确的界定和统一的标准,老年贫困人口识别的准确性不足,不同研究的结论存在很大分歧。特别是教育、健康、家庭和社会支持等因素与老年贫困的关联被忽视、贫困线的设定较为主观等问题,对厘定城市老年贫困的空间格局和制定相关政策造成很大困扰。本文通过北京市典型居住社区的实证研究对上述问题进行了探讨,首先基于老年人属性变量的因子分析构建了城市老年贫困的综合判别指标;然后通过贫困线的优化分析,估计不同类型居住社区的老年贫困比例;再以市域范围内的街道和中心城区周边的地区办事处为空间单元,对北京市城市老年贫困的空间格局进行了分析。研究结论为:① 资源、健康、独立性和性别是老年人属性差异的决定因子,其中资源因子得分综合反映了城市老年人的贫困程度。② 不同类型居住社区的城市老年贫困比例存在显著差异,根据居住社区的分布,测得北京城市老年人口的贫困比例为9.55%。③ 城市内部老年贫困的空间格局分析表明:城市老年贫困人口比例从首都功能核心区、城市功能拓展区、城乡结合部地区到外围城区顺次增加;城市老年贫困人口密度则以外围城区与首都功能核心区最高,城市功能拓展区居中,城乡结合部地区最低。这些结果为进一步制定不同地区的老年贫困对策提供了参考依据。