Understanding the origins and pace of Africa’s urban transition

In this paper the author argues that urbanisation should be understood as a global historical process driven primarily by population dynamics stimulated by technological and institutional change. In particular, disease control and expanded access to surplus energy supplies are necessary and sufficient conditions for urbanisation to occur given historical evidence of an inherent human propensity to agglomerate. Economic development, which has traditionally been viewed as the primary driving force behind urbanisation, can accelerate the process but is not a necessary condition for it to occur. Informed by this historically-grounded theory of urbanisation, a range of qualitative and quantitative evidence is used to explain the stylised facts of sub-Saharan Africa's urban transition, namely the late onset of urbanisation in Africa vis-a-vis other major world regions, the widely noted but inadequately explained phenomenon of 'urbanisation without growth' observed in Africa in the 1980s and 1990s, and the historically unprecedented rates of urban population growth seen in the region throughout the late twentieth century

REGIONAL INCOME INEQUALITY AND URBANISATION TRENDS IN CHINA: 1978-2005

A long-standing economic literature has delivered rich empirical evidence on the relationship between economic growth and income inequality or urbanisation, since Simon Kuznets’ pioneering work on the inverted U curve hypothesis. This paper explores the relationship between urban inequality and urbanisation trends in China from 1978 to 2005, a period that corresponds to the economic opening up of the country to the market economy. One of the main issues, here, is not only to test the correlation between regional income inequality and urbanisation trends, but also to highlight the neighbouring effects of this correlation, mainly through the use of some new spatial analysis tools. This paper delivers two conclusions: firstly, neighbouring effects are stronger when it comes to income inequality than urbanisation; secondly, a distortion in development patterns, between northern and southern coastal China appears: in the first one, growth effects and urbanisation process spread all over the different provinces, while in the second one, Guangdong appears as a regional economic centre.INCOME INEQUALITY, URBANISATION, CHINA, SPATIAL

Elementary processes governing the evolution of road networks

Urbanisation is a fundamental phenomenon whose quantitative characterisation is still inadequate. We report here the empirical analysis of a unique data set regarding almost 200 years of evolution of the road network in a large area located north of Milan (Italy). We find that urbanisation is characterised by the homogenisation of cell shapes, and by the stability throughout time of high-centrality roads which constitute the backbone of the urban structure, confirming the importance of historical paths. We show quantitatively that the growth of the network is governed by two elementary processes: (i) `densification', corresponding to an increase in the local density of roads around existing urban centres and (ii) `exploration', whereby new roads trigger the spatial evolution of the urbanisation front. The empirical identification of such simple elementary mechanisms suggests the existence of general, simple properties of urbanisation and opens new directions for its modelling and quantitative description.Comment: 10 pages, 6 figure

Eureka and beyond: mining's impact on African urbanisation

This collection brings separate literatures on mining and urbanisation together at a time when both artisanal and large-scale mining are expanding in many African economies. While much has been written about contestation over land and mineral rights, the impact of mining on settlement, notably its catalytic and fluctuating effects on migration and urban growth, has been largely ignored. African nation-states’ urbanisation trends have shown considerable variation over the past half century. The current surge in ‘new’ mining countries and the slow-down in ‘old’ mining countries are generating some remarkable settlement patterns and welfare outcomes. Presently, the African continent is a laboratory of national mining experiences. This special issue on African mining and urbanisation encompasses a wide cross-section of country case studies: beginning with the historical experiences of mining in Southern Africa (South Africa, Zambia, Zimbabwe), followed by more recent mineralizing trends in comparatively new mineral-producing countries (Tanzania) and an established West African gold producer (Ghana), before turning to the influence of conflict minerals (Angola, the Democratic Republic of Congo and Sierra Leone)

Problems and Prospects of Urban Environmental Management in Pakistan

Discussions on environmental conditions often assume that urbanisation contributes to the degradation of the environment. However, urbanisation per se is not detrimental to the environment. Concentrations of population and economic activities through urbanisation offer opportunities in providing environmental infrastructure and health services costeffectively, because of economies of scale. It also provides opportunities to effectively internalise environmental costs; because concentration of economic activities reduces user charges and costs of tax collection, enforcement, and wastes management, which are essential to environmental protection. Nevertheless, while providing opportunities the process of urbanisation also generates environmental pressures. A nation that is unable to utilise the opportunities and alleviate the pressures through integrated environmental, economic and physical planning finds that mismanaged urbanisation can pose enormous environmental and economic problems that become increasingly difficult to solve with time. Unfortunately, Pakistan is one of the countries which have not managed the process of urbanisation effectively. This paper, after tracing the urbanisation trends in Pakistan, discusses the existing and emerging environmental impacts and risks. The country is at the stage of risk transition where modern risks caused by industrial and traffic pollution, such as chemicals, heavy metals and noise, combine with the traditional risks such as bacteriological and parasitic infections caused by inadequate infrastructure facilities particularly water supply and sanitation. The paper also analyses the responses to urban environmental problems in terms of approaches to sustainable urban development. Finally, it outlines the holistic policy directions to environmentally sound and sustainable urban development, including institutional, regulatory, economic and participatory measures.

Urbanisation lowers great tit Parus major breeding success at multiple spatial scales

While numerous studies have reported negative effects of urbanisation on birds, few have examined the role of urban scale in influencing breeding success. Furthermore, many studies have relied on qualitative rather than quantitative assessments of urbanisation. This study sought to address these issues by testing the effects of urbanisation, measured at two spatial scales, on the breeding success of great tits Parus major. A nested study design, incorporating over 400 nestboxes, was used in study sites across northern Belgium with a priori quantified degrees of urbanisation at both local and regional scales. All measured breeding parameters were found to vary at one or both spatial scales of urbanisation; in more urbanised areas great tits displayed advanced laying dates but lower breeding success compared to rural areas, with smaller clutch sizes, lower nestling masses and fewer fledglings per egg. Importantly, urbanisation effects were not limited to big cities as birds breeding in gardens or parks in small towns also had comparatively low success. We found that both regional- and local-scale urbanisation had consistent significant effects on laying date, clutch size and nestling mass, while the number of fledglings per egg was negatively influenced by local-scale urbanisation only. Results of this study therefore highlight the importance of utilising multiple spatial scales in analysing urbanisation effects, as well as the potential negative impact of local urbanisation on breeding success. This calls for further investigation into mechanisms driving urbanisation effects and how these may vary at different scales

Effects of urbanisation and landscape heterogeneity mediated by feeding guild and body size in a community of coprophilous beetles

Although the impacts of urbanisation on biodiversity are well studied, the precise response of some invertebrate groups remains poorly known. Dung-associated beetles are little studied in an urban context, especially in temperate regions. We considered how landscape heterogeneity, assessed at three spatial scales (250, 500 and 1000 metre radius), mediates the community composition of coprophilous beetles on a broad urban gradient. Beetles were sampled using simple dung-baited traps, placed at 48 sites stratified across three distance bands around a large urban centre in England. The most urban sites hosted the lowest abundance of saprophagous beetles, with a lower mean body length relative to the least urban sites. Predicted overall species richness and the richness of saprophagous species were also lowest at the most urban sites. Ordination analyses followed by variation partitioning revealed that landscape heterogeneity across the urban gradient explained a small but significant proportion of community composition. Heterogeneity data for a 500-metre radius around each site provided the best fit with beetle community data. Larger saprophagous species were associated with lower amounts of manmade surface and improved grassland. Some individual species, particularly predators, appeared to be positively associated with urban or urban fringe sites. This study is probably the first to examine the response of the whole coprophilous beetle community to urbanisation. Our results suggest that the response of this community to urbanisation matches expectations based on other taxonomic groups, whilst emphasising the complex nature of this response, with some smaller-bodied species potentially benefitting from urbanisation

The Process of Urbanisation in Pakistan, 1951–81

The current level of urbanisation in Pakistan, approximately 33 percent in 1998, is not high by global standards. But it is commonly linked with unemployment, underemployment, shortage of housing, transport and other infrastructure like water supply and sewerage. Compared to other areas of population dynamics, such as fertility and mortality, studies in the field of urbanisation and internal migration in Pakistan are rather limited. During the last three decades hardly half a dozen studies could be added in the field of urbanisation. These studies are primarily based on data generated by the different censuses. After the 1979 Population Labour Force and Migration (PLM) Survey, no nationally representative survey addressing the issue of urbanisation and internal migration could be carried out. Even regional studies could not be conducted during the last two decades. The present study is designed to utilise the 1998 census data to investigate urban population growth, pace (or tempo) of urbanisation and components of urban growth for the period of 1981–98.

The Role of the Inhabitants of Łódź in the Urbanisation of its Surrounding Area

This article describes the urbanisation process within the recreational region surrounding Łódź. After an introduction to theoretical issues, the topic will be the ongoing changes, their stages, and effects on various planes of this urbanisation. The emphasis is put on showing the characteristics and scale of the process, its causes and social features. The paper concludes by demonstrating the dominating influence of the inhabitants of Łódź on urbanisation processes caused by their tourism and recreational activity in this area

The Geography of New Firm Formation: Evidence from Independent Start-ups and New Subsidiaries in the Netherlands

This paper investigates to what extent determinants of the rate of independent startups and the rate of new subsidiaries are different. Using a regional data base for the Netherlands over the period 1988-2002, we investigate the impact of two types of agglomeration effects, localisation and urbanisation, while controlling for a range of economic variables. We find urbanisation economies to be particularly important for the creation of new subsidiaries while localisation economies are more important for the creation of independent new ventures. Finally, the effect of agglomeration variables is found to be stronger for manufacturing industries compared to services industries.