Residential Distribution of the Emergent Class of Skilled Migrants in Nanjing

Migration in China is traditionally dominated by unskilled rural-urban migrants that find their way into the city through urban villages, dormitories or informal housing. However, a remarkable increase in the number of skilled migrants has been witnessed with the economic restructuring. Reforms in the labour and housing market have shifted the spatial arrangement of opportunities, consequently changing migrants' access to the cities. Using 2000 Population Census and employing spatial regression models, this study shows skilled migrants to have better access to the city in the sense that their residences locate in the areas with more professional jobs and better houses. It is their advantages in the labour market that determines their favoured access to the public sector housing, resulting in better residential locations. Female skilled migrants are less likely than males to settle in areas with a large proportion of urban village housing or shared accommodation. These findings reveal the heterogeneity among migrants and the concomitant differences in spatial behaviour.     

A Spatial Analysis of Job Openings and Access in a U.S. Metropolitan Area

This article presents a study of spatial distribution of job openings and spatial variation in job accessibility in the Boston Metropolitan Area. The most striking finding is that despite decades of employment decentralization, job openings suitable for less-educated job seekers are still relatively concentrated in the central city. This is due to the fact that the great majority of job openings are vacancies resulting from turnover, the spatial concentration of which reflects the spatial concentration of current employment. A related finding is that for a given transportation mode, less-educated job seekers who reside in the central city still have, on average, somewhat better access to job openings than those who reside at the periphery of the metropolitan area. However, accessibility differentials among locations are small as compared to accessibility differentials between transportation modes. For job seekers who can travel by car, the majority of residential locations will allow them to have an access level higher than the average. For job seekers who depend on public transit, on the other hand, very few residential locations will allow them to have an above-average access level. These findings have important policy implications.     

大城市职住空间匹配及其与轨道交通的协调发展研究:以深圳市为例

轨道交通将高密度职住空间串联,主要是从客流生成的角度促进人们更多地使用轨道交通和减少小汽车的使用,还需要从客流流动的角度考虑职住空间匹配的需求以及其与轨道交通的协调关系.以深圳市作为研究案例,采用建筑普查数据、社保信息数据、居住人口数据和轨道交通刷卡数据等多源信息数据,通过分析深圳市的职住空间分布特征及其与轨道交通的关系,探讨职住空间匹配问题及其与城市轨道交通的互动协调.研究提出:发展轨道型职住匹配,关注低生活成本居住空间的供给,但不能以轨道型职住匹配替代近域型职住匹配;弱化轨道交通的长距离通勤功能,基于就业中心的集聚构建生活通勤圈,形成客流流动的多中心城市格局.     

The spatial structure of American cities: The great majority of workplaces are no longer in CBDs,employment sub-centers,or live-work communities

Urban transport and land use policies are informed by our perceptions of the prevailing spatial structure of cities. This structure can be characterized by five models: The Maximum Disorder model, the Mosaic of Live-Work Communities model, the Monocentric City model, the Polycentric City model, and the Constrained Dispersal model, where the great majority of jobs are dispersed outside employment centers and where workers and workplaces in a metropolitan-wide labor market adjust their locations to be within a tolerable commute range of each other. We examine evidence from a stratified sample of 40 U.S. cities and from the 50 largest U.S. cities in 2000 to show that the latter model best characterizes the spatial structure of contemporary American cities. The Constrained Dispersal model is, in essence, a hybrid model that combines elements of all other models. We found that, on average, only 1 out of 12 people live and work in the same community; only 1 out of 9 jobs is still located in the CBD; and only 1 out of 7 jobs is located in employment sub-centers outside the CBD. All in all, the great majority of jobs—3 out of 4 of them—is dispersed outside employment centers, including the CBD, and is beyond walking or biking distance. Maintaining and increasing the productivity of American cities now require a sustained focus on meeting the travel demands of this great majority of commuters, rather than promoting transportation strategies focused on improving access to CBDs and employment sub-centers, or within live-work communities.     

The Connection Between Public Transit and Employment

Urban transit systems in most American cities…have become a genuine civil rights issue-and a valid one-because the layout of rapid-transit systems determines the accessibility of jobs to the Black community. If transportation systems in American cities could be laid out so as to provide an opportunity for poor people to get meaningful employment, then they could begin to move into the mainstream of American life. A good example of this problem is my home city of Atlanta, where the rapid-transit system has been laid out for the convenience of the white upper-middle-class suburbanites who commute to their jobs downtown. The system has virtually no consideration for connecting the poor people with their jobs. There is only one possible explanation for this situation, and that is the racist blindness of city planners. Martin Luther King, Jr. (1986, pp. 325-326)

Much attention is being paid to the role of public transit in employment-related mobility for urban residents, yet there is very little evidence of the degree to which one affects the other. Little research has focused on how labor participation is affected by increases in urban workers' access to public transportation. Research on the spatial mismatch hypothesis has dealt with the relationship between labor participation and the spatial separation of workers' residences from suitable jobs; however, most analyses concentrate on commuting time or distance as a function of auto use. Few studies have considered the impacts of public transportation on labor participation. This article describes a study analyzing the locations and employment characteristics of workers with varying levels of access to public transit. Using census data and a variety of spatial measures generated by a geographic information system (GIS), a two-stage least squares regression was used to estimate the relationship of access to public transit with labor participation levels for Portland, Oregon, and Atlanta, Georgia. The results suggest that access to public transit is a significant factor in determining average rates of labor participation within these two cities.     

Job-worker spatial dynamics in Beijing: Insights from Smart Card Data

As a megacity, Beijing has experienced traffic congestion, unaffordable housing issues and jobs-housing imbalance. Recent decades have seen policies and projects aiming at decentralizing urban structure and job-worker patterns, such as subway network expansion, the suburbanization of housing and firms. But it is unclear whether these changes produced a more balanced spatial configuration of jobs and workers. To answer this question, this paper evaluated the ratio of jobs to workers from Smart Card Data at the transit station level and offered a longitudinal study for regular transit commuters. The method identifies the most preferred station around each commuter's workpalce and home location from individual smart datasets according to their travel regularity, then the amounts of jobs and workers around each station are estimated. A year-to-year evolution of job to worker ratios at the station level is conducted. We classify general cases of steepening and flattening job-worker dynamics, and they can be used in the study of other cities. The paper finds that (1) only temporary balance appears around a few stations; (2) job-worker ratios tend to be steepening rather than flattening, influencing commute patterns; (3) the polycentric configuration of Beijing can be seen from the spatial pattern of job centers identified.     

Social and spatial differentiation of high and low income groups’ out-of-home activities in Guangzhou,China

With China’s rapid urbanisation driving its growing economy, the enlarging socio-spatial inequalities in the cities have received wide attention. Rather than following the largely studied residential spaces, this paper focuses on socio-spatial differentiation based on the spaces of one’s out-of-home activities. Using data of 1006 individuals collected by door to door questionnaires, this paper sets up the spatial and temporal autocorrelation GT coefficient to examine the spatial heterogeneity characteristics of high- and low income groups’ out-of-home activities in a continuous spatiotemporal framework. The factors and different mechanisms influencing the clustering of the activities are discussed to better understand social diversity in post-reform urban China. The results suggest that there is obvious spatial and temporal variation in high- and low income groups’ out-of-home activities, indicating that differing social spaces are not just limited to the macro-static residence-based living space, but also exist in the individual’s daily-activities space. Both high- and low income people have drastically different activity spaces and they may not interact much with each other. This is socially very significant because it means that there is considerable social isolation or segregation for both groups. The results also show that within the same income group there exists a divisive cluster with different formation mechanisms, including the job–housing relationship, the correlation of activity opportunities with those surrounding residential areas and the individual’s ability to access activities (that is, space–time accessibility). Structural transition can also impact on activities choices of various social groups.     

Housing location choices of the poor: does access to jobs matter?

Abstract

This research investigates whether access to jobs affects poor households’ residential location choices using data from individual households in the Chicago Metropolitan Area. Our results, based on discrete choice models, show that the effects of job accessibility on household location choices are contingent upon households’ automobile ownership and employment status. Places with higher job accessibility by public transit mode are more likely to attract poor households that do not own cars but have at least one employed worker or one labour force participant, while job accessibility by automobile travel mode has no positive effect on the location choices of poor households who own automobiles. The results stress the importance of job accessibility for those poor households with limited transportation mobility but strong needs for access to jobs.     

基于制造业区位商分析的中国三大城市群经济空间演变实证与解释

中国城镇化已开始进入快速发展期,正发生着结构性转型--由个体城市向城市群体的跨越,展开城市群研究具有理论与实践的双重意义.基于对城市作为区域主体的假设,以分工与博弈理论为基础,首先给出城市群经济空间演变的两个认知主线:①一种专业分工的生产网络:②一种竞合博弈的关系图式.继而研究选择长三角、京津冀与珠三角三大城市群为城市群产业经济空间演变实证案例,采用制造业区位商作为刻画城市基础产业部门与区域分工的基本变量,借助Excel与Suffer软件,进行1997、1999、2001、2003、2005共5个年份的定量化与图形化演变信息分析,初步发现:①三大城市群经济空间形态差异明显,显示出城市群发育程度差距;②城市群内部的制造业分工地位不断变化,重组明显;③制造业分工空间关联密切,核心组团空间连续格局明显等两个重要特征.以期通过研究工作有助于拓展与丰富的城市群研究相关理论与方法.     

Integrating conservation planning and landuse planning in urban landscapes

The rapid growth of cities around the world is now seen as a major contributor to global biodiversity loss and many governments include biodiversity conservation as an explicit policy goal. To help prevent further loss of biodiversity, there is an urgent need for more strategic approaches to conservation planning in urban environments based on a scientific understanding of landscape patterns, species requirements and development pressures. In this study, we demonstrate the use of new conservation planning tools to better integrate information on threatened species into landuse planning. We present a case study in the Greater Melbourne area that utilises the Zonation conservation planning tool with data for 30 threatened fauna species. We perform a multi-species spatial prioritisation that incorporates species-specific connectivity requirements and demonstrate the use of this information in a number of landuse planning contexts. First, we quantitatively assess the differences between Melbourne's current conservation areas with the locations prioritised by Zonation and determine priority areas for their extension. We then show how the prioritisation can be used in decisions regarding Melbourne's Urban Growth Boundary and in rezoning land for development. Finally, we demonstrate how the prioritisation can be used to identify areas of conservation significance within individual developments that account for the wider landscape context. These results demonstrate how conservation planning tools can be better integrated into the different stages of landuse planning for future urban growth.     

The Geography of an EthniCity: Residential Segregation of Birthplace and Language Groups in Sydney, 1996

Many contemporary cities have a diverse ethnic-cultural mix as a result of different international migration streams, with implications for the residential distribution of various ethnic groups within those cities. Boal recently suggested a series of scenarios against which the pattern in any one place could be evaluated. These are applied to Sydney in 1996, when over 34 per cent of the residents reported a birthplace outside Australia and 30 per cent reported using a language other than English at home. Lacking data on ethnic status, the birthplace and language data are used to explore Sydney's residential geography at two spatial scales, and to identify the degree of residential segregation of each birthplace and language group. Regression analysis, used to assess the relevance of human capital to observed levels of segregation, suggests that Boal's assimilation scenario accounts for most of the observed geographies, with some additional pluralism but little evidence of polarisation. These results suggest that the dynamics of Sydney's housing market facilitate movement into most areas of demand, subject only to labour market constraints; differential access to sections of the labour market, and hence to housing market sections, is a major factor in the residential segregation of birthplace and language groups in Sydney.     

Can urban sprawl lead to urban people governing rural areas? Evidence from the Dywity Commune,Poland

Currently, new suburban settlements are often being localized in rural areas. As a result of this, rural areas have been taking on various urban functions, especially residential ones. Intense migration has been observed, especially in rural areas neighboring large cities. The urban population has been settling in the most attractive residential localizations, and thus creating new housing developments with a high population density, characterized by urban type of construction. Such a process, both favorable and inevitable, leads to other effects, including changes among the local authorities and thus, local policy. The main purpose of this article was to answer the question of whether new urban functions in rural areas resulting from urban sprawl can lead to urban people governing rural areas? If the answer is positive, what other consequences may this bring? The aim was accomplished through the careful examination of a selected area of Poland. The particular value of this study is that its structure and suggested scenarios of possible effects can help local authorities governing areas neighboring cities create suitable spatial plans that include residential areas.     

Residential outcomes of forced relocation: lifting a corner of the veil on neighbourhood selection

Fear of the detrimental effects of ethnic segregation has pervaded the debate on the population composition of cities and neighbourhoods. However, little is known about mechanisms underlying the spatial sorting of ethnic minorities. Hence, policies aimed at desegregation may result in exactly the opposite - that is, new ethnic concentrations and segregation. This paper studies the residential outcomes of 658 forced movers from urban restructuring areas in The Hague. Compared with "native" Dutch (those with both parents born in the Netherlands), ethnic minorities report neighbourhood improvement less often and are more likely to stay within or move into other ethnically concentrated neighbourhoods. These differences are not fully explained by differences in individual characteristics, resources, institutional factors, pre-relocation preferences or other relocation outcomes. Ethnic specificities in neighbourhood choices thus remain a pressing issue for further research.     

中外大中城市居住空间分异的动因比较分析

文章从城市居住空间分异的动因角度对中西方城市居住分异进行了比较研究,并对中西方城市发展过程中居住空间分异的特征进行了归纳总结。     

Residential Dynamics in Ethnic Concentrations

In many countries and cities there is fear that large residential concentrations of ethnic minorities will hinder integration and give rise to sub-societies that may eventually come to have little to do with each other. However, while governments develop policies aimed at spatial mixing of various population categories, the actual knowledge about ethnic concentrations and their development is rather thin. This paper intends to contribute to filling this gap in knowledge about ethnic concentrations and related dynamics using very detailed spatial data on settlement patterns in the city of Amsterdam. It focuses on residential concentrations of Moroccans and Turks and analysed the changes with regard to these concentrations between 1994 and 2004. In general no indications were found that one of these groups is consciously strengthening the ethnic identity of the residential areas they live in. Although the existing Moroccan clusters did appear to have become somewhat more Moroccan, the Moroccans themselves experienced a negative migration balance in those areas. Turkish clusters became even less Turkish and there was also a negative migration balance among Turks. Furthermore, concentrations within the 1994 boundaries were, in 2004, less Moroccan and Turkish than would be expected, given the developments that took place in Amsterdam as a whole. Detailed analysis of the clusters demonstrated no clear systematic increase or expansion of existing clusters. Analyses of associations with housing supply support the assertion that the residential dynamics of immigrants must be seen primarily as resulting from a number of steps in the residential career. Residential behaviour that has been described for the immigrant categories in question can be assumed to reflect a development toward integration.     

Migration,caste and livelihood: evidence from Indian city-slums

This paper based on a primary survey of slum dwellers in four Indian cities examines the caste dimension of migrants and the nexus, if any, between caste and the job market participation. Based on the quantitative exercises, we observe overlaps between social and economic status. A higher propensity to migrate is evident among the population belonging to the general (GEN) category and other backward castes in comparison to the scheduled castes and tribes who are at the bottom of the caste hierarchy. The disadvantaged castes are not even in a position to take the benefits of migration. Further, those with higher caste status seem to have better endowments required for absorption in the urban job market; the migrants of higher caste status are absorbed in relatively better jobs compared to the lower castes. Migrant workers from GEN category draw relatively higher incomes. On the whole, when both the caste and migration dimensions are combined, at the lower echelons, migration does pay if the worker is better off in terms of caste status. From this point of view, it is argued that special programmes offering improved access to livelihood opportunities need to be pursued in the rural areas so that the disadvantaged castes are able to reduce their vulnerability.     

Globalized Freight Transport: Intermodality,E-Commerce,Logistics and Sustainability

Problem, research strategy, and findings: Recent research reveals growing spatial disparities in warehousing-related environmental externalities, including air pollution and traffic safety concerns, across municipalities. The existing research, however, fails to present how institutional factors contribute to spatial variations. In this study, I explore how variations in planning practices contribute to the different trajectories of warehousing development. I interviewed planners, local residents, warehousing developers, and regional agency staff to identify local planning practices and policy elements that affect the location choice of warehousing facilities. My results show land use policies (land use permission, industrial zoning, and land parcel division schemes), job-related policies (job creation initiatives and job density requirements), financial incentives (tax rates and financial incentives), and environmental regulations (building design, land use buffering, and landscaping) are the major planning elements that affect warehousing development. Relative to brownfield redevelopment in the municipalities close to the urban core of a metropolitan area, developing greenfield warehousing facilities in suburban cities is likely to cause more environmental concerns in the near future. However, unmeasured factors could be responsible for some of the warehousing development patterns I find in the data.

Takeaway for practice: Knowledge, communication, and collaboration are needed to cope with the rapid growth and, in particular, the disproportionate concentration of warehousing-related environmental externalities in certain municipalities. In this study I also provide planning strategies to regulate excessive warehousing development, including land use- and job-related policies, financial incentives, and environmental regulations. With these strategies, planners in warehousing-intensive cities can determine the best way to reduce the impacts of environmental externalities on local communities in the long term.     

轨道交通对城市空间布局的影响探析

通过对我国已建和在建的轨道交通线路的综合研究,对轨道交通对城市空间布局的影响进行总结与概括。着重从居住空间的转移、商业空间的变化两个方面深入分析了轨道交通对城市空间布局的作用机理及其影响,进而从宏观上分析轨道交通在影响城市更新的过程中对城市整体空间布局的作用     

Unstable Immigrant Concentrations in Amsterdam: Spatial Segregation and Integration of Newcomers

Watching the profound changes in the last decades in virtually any big city in Western Europe in the field of migration, minority and ethnicity, many national and urban governments in Europe fear for large spatial concentrations of immigrants who originate from non-industrialised countries. The basic assumption behind that attitude seems to be that large concentrations of (ethnic) immigrants would prevent their full integration and thus participation in society. Such a risk of insufficient integration would particularly be great when the immigrant population occupies the lower positions of the socio-economic ladder. However, two things should be investigated with care. First, what are the actual explanations for the social and spatial divisions that are encountered in cities? What does that imply for the (spatial) inequality in Dutch cities? Second, what can be said about the effects of recent changes that can be observed with respect to the explanatory dimensions in the Dutch context? How do these compare to the actual size and stability over recent years of the spatial patterns of immigrants? Popular images of the processes of immigration describe the development of 'ethnic ghettos'. These would particularly develop where state intervention in the spheres of housing and in many other spheres is small or, as in the Netherlands, is declining. This paper investigates whether that view does justice to the actual development, applying micro-level data on immigrant settlement patterns in the city of Amsterdam over the period 1994-99. It is argued that ethnic residential concentrations tend not to be stable and are just growing areal units, but many changes can be shown, which may reflect processes of housing careers and of integration in society.