Path-dependency in public–private partnership in French urban renewal

Public–private partnership in urban renewal in France concerns mainly housing, transport infrastructure and large public facilities. The distinction between public, private and civil actors does not concern social and economic development. This situation tends to limit the integration of different issues and approaches in renewal projects. Also, French urban renewal projects do not produce a new type of partnership between public and private actors and the regulatory framework. These projects remain publicly dominated policy-making procedures because of the uneven distribution of resources and assets and despite a policy discourse emphasising the need for a new division of work between state, market and civil society. The current French situation cannot be understood without bearing in mind the history of urban planning policies in France. Using a historical analysis and the path-dependence approach, we highlight the resilience of inherited structures of interaction between public and private actors.     

Ambivalent landscapes—wilderness in the urban interstices

This paper explores the origins and development of ambivalent responses to particular contemporary urban landscapes in historical ideas about human relationships with nature and wilderness, and suggests that post-modern wilderness may be found in the urban interstices: in woodland, abandoned allotments, river corridors, derelict or brownfield sites and especially areas in which the spontaneous growth of vegetation through natural succession suggests that nature is in control. We propose that these interstitial wilderness landscapes have numerous important functions as well as being rich repositories of meaning with implications both for theorizing nature–human relationships and for urban landscape planning and design.     

Transnational urban policies: ‘relocating’ Spanish and Brazilian models of urban planning in Buenos Aires

This article examines the transnationalization of urban policies by analysing the adoption of two ‘foreign’ models of participatory urban planning in the city of Buenos Aires. Both schemes are modelled on internationally acclaimed experiments: Barcelona's Strategic Plan and Porto Alegre's Participatory Budget. In Buenos Aires, however, these policy transfers have failed to produce the remarkable results for which their Spanish and Brazilian exemplars have been internationally praised. Traditional accounts of policy transfers ponder on the institutional compatibility between imported schemes and host environments. The author argues that these works tend to overlook the significance of the stochastic conditions presiding over the adoption of particular policy models in different cities. She proposes to deviate from traditional approaches by seeking an explanation for the poor results of the schemes in Buenos Aires in (a) the contextual conditions framing their adoption in the Argentine capital, and (b) the circumstances surrounding their emergence in Barcelona and Porto Alegre.     

Production and transport of urban wet weather pollution in combined sewer systems: the “Marais” experimental urban catchment in Paris

An experimental catchment area was set up in the centre of Paris (France) so as to follow up the quality of wet weather flows from the entry to the exit of a combined sewer network. The distinctive characteristic of this site is its location in a town centre and the extent of the equipment used to monitor the water pollution over the whole length of its course through the catchment area. The results obtained show a change in quality between the runoff entering the sewer network and the combined storm water flow at the sewer's outlet, which cannot be explained only by the mixture with domestic wastewater. In particular, an increase was observed in the concentrations of suspended solids (SS), VSS, COD, BOD and Cu, in the proportion of pollutants linked to particles and in the characteristics of the particles. A calculation of the total masses going in and out of the sewer network during a rainfall event shows that the erosion of in-sewer pollution stocks is the main source of particles and of organic matter in wet weather flows, whereas heavy metals loads originated from roof runoff, due to the corrosion of metallic roofs. Particles eroded from the sewer sediments during rain events were found to be quite different from the particles of type A deposits and organic biofilms. Nevertheless, they have mean organic and metallic loads that are of the same order of magnitude as the particles of the organic layer at water sediment interface. A change in the chemical form of heavy metals was noticed during the transport in the sewer and it is suspected that a fraction of the dissolved metals from the runoff is adsorbed on sewer sediments.     

Okun’s law and urban spillovers in US unemployment

Using data for 2002–2010 from 358 Metropolitan Statistical Areas (MSA), we estimate Okun’s law which accounts for national shocks and spatial spillovers in urban areas. Our scale of measurement is changed to the state level, allowing us to capture a different source of spatial dependence on unemployment. Our main finding is that MSA-specific growth has a small effect on MSA unemployment rate, implying that in a well-integrated labor market like the USA, unemployment at an urban level is highly dependent on neighboring and national labor market conditions. Our results also show that the driving forces behind the behavior of unemployment for MSAs are different than those for states.     

Housing the elderly: segregated in senior cities or integrated in urban society?

Ageing is driving the demand for housing for seniors in the Netherlands. The current urban planning ??cluster policy?? is mainly conducive to the construction of luxury inner-city apartments for seniors. Much less attention is given to the demand for dwellings for seniors outside the cities and for low- and middle-income households. Should the government accommodate this demand by constructing accessible dwellings? And would a ??senior city?? be a suitable framework for this purpose? The issue is whether senior citizens actually want to live together in a district, village or city. Would they want to move there if these senior cities were some distance away from other (age) groups, family, friends and services such as shops and care? We question whether the demand for senior cities is sufficiently strong to warrant abandoning the European planning principle of clustering. Doing so would lead to fragmentation of the landscape and less support for services in urbanized areas. The impetus for this study came from the major shortage of accessible housing in the Netherlands and a recent initiative to build a senior city of 1,500 dwellings in the province of Flevoland.     

Transnational urban spaces and urban environmental reforms: analyzing Beijing’s environmental restructuring in the light of globalization

In this era of globalization, ‘transnational spaces’ are being created within urban settings, providing a direct connection between the ‘local’ and the ‘global’. Corporate headquarters, hotels, shopping malls, and airports are typical examples of such spaces, which while located within an urban territory, are often conceived by foreign designers, developers, and manufacturers, as well as maintained by multinational companies and banks. Such local–global interconnection is giving urban management a new shape, as urban management practices are now frequently intertwining with global construction and property management approaches. This paper argues that, at the same time, a set of new mechanisms that may help to tackle problems related to the urban environment and infrastructure is unfolding. Starting with a conceptual discussion of the role of globalization in urban environmental restructuring, this paper subsequently explores the context of Beijing and the environmental management possibilities introduced in this city by global actors (through the examples of World Tower, IBM Tower, and ABN AMRO and ING head offices). Beijing, due to China’s recent economic opening process, provides an intriguing backcloth to demonstrate how transnational urban spaces—standing in-between the local and the global—may canalize environmental innovations from the ‘global’, putting globalization at work for a better urban environment.     

Urbanizing villages: informal morphologies in Shenzhen’s urban periphery

The phenomenon of urban villages in China has received much scholarly attention in recent years, mostly about their socio-economic aspects and its role in accommodating rural migrants. While the link between the socio-economic functioning and the morphology of urban villages has been recognized, detailed spatial research, and morphological research in particular, is limited. Morphological research has generally focused on either rural villages or centrally located urban villages and much of the peri-urbanity that constitutes the majority of informal development in China remains under-researched. This paper explores the morphologies of urbanizing villages in Shenzhen’s urban periphery, with a particular focus on the distinctions between the old village core and newly built expansions. The paper opens up a series of questions about the morphology and morphogenetic processes of these villages and establishes a framework for future enquiry. How do we understand the informalized planning mechanisms in urban villages? How do we explain the morphological variation of urban villages? Are the processes that characterize urban villages restricted to the Chinese context or is there scope for regional comparison?     

Where is urban food policy in Switzerland? A frame analysis

Food is increasingly included on the urban agenda in many countries, and comprehensive food policies have been developed in several cities, but the development of articulate urban food policies is still in its infancy in Switzerland. The goal of this paper is to explore the ways in which food is framed in official policies in Switzerland and thereby gain a better understanding of the potential for the development of urban food policies. The analysis is based on a case study approach focusing on the formal frames of food: reconstructed from official policy documents on agriculture, food, health, environment, and planning, at the federal and the local level. The results show that ‘urban food’ is not a major topic in most policy documents and that the dominant frame of food is economic. There is a clear distinction between the rural and the urban, and there were no frames integrating (rural) food production and (urban) consumption, across the city’s departments, or between the local and the federal level. We can conclude that there is not yet a comprehensive urban food policy in Switzerland. The analysis further allows the nomination of two possible pathways to guide the development of coherent and integrative urban food policies.     

Does urban form matter in solo and joint activity engagement?

This research examines how the residential built environment relates to residents’ solo versus joint engagement in shopping, dining, and recreational/fitness activities. Using data from the 2006 Greater Triangle Travel Survey in North Carolina, individual activity engagement is innovatively measured using two indicators: total time spent alone and total time jointly spent with household members on a specific non-work activity type. The impact of the built environment on non-work activity engagement is then estimated using Heckman sample selection models along with a seemingly unrelated estimation system. We find that residents living closer to parks and department stores on average are more likely to participate in out-of-home recreation and shopping activities. A comparison of coefficients in solo versus joint engagement models shows that park accessibility is much more important to household joint participation than to solo participation in recreational activities. The research generates new knowledge on how the built environment may influence solo versus joint activity engagement differently. The findings are useful to urban planners who are interested in reviving local economy and promoting active living/social interaction.     

From diversity to justice – Unraveling pluralistic rationalities in urban design

For Jane Jacobs, the city is a fundamental unit of diversity; she develops her ideas in the city around this key axiom. Diversity provides an ethical orientation and thus defines what a just city should achieve. For Jacobs, justice is represented by peoples' inherent right to ‘make cities’. According to Jacobs, cities become just places by their ability to facilitate the spontaneous dynamics among social fabrics and urban spaces to generate the beauty and value of cities. This contribution picks up this claim for diversity and develops a theoretical lens to explore how diversity is incorporated in urban design. We use a theory on pluralism—Cultural Theory—to analyse forms of managing urban space in different types of goods. This is applied to analyse four idealistic urban spaces in the city of Leipzig.     

Top-down sustainable urban development? Urban governance transformation in Saudi Arabia

This paper focuses on transformation in sustainable urban governance by examining the prospect of fostering sustainable development through top-down urban governance. It takes a case study of urban development in Saudi Arabia, which had been administered through a centralized framework devoid of the environmental assessment of policies and plans. Urban planning documents made limited references to the environment. Consequently, Saudi cities have been ranked low on environmental sustainability. However, recently, due to the political imperative of addressing the problems, low oil prices, and the Arab Spring, there has been a remarkable transformation in urban governance. The planning of some of the major cities has been decentralized and some policies implemented to curb unsustainable development. This article reviews these changes to investigate how top-down approaches might still be relevant in promoting sustainable development. It concludes that there is a need to implement a framework of legislation and administrative procedures integrated with strategic environmental assessment (SEA) to ensure proper sustainable institutionalised urban governance. The findings could serve as lessons for those operating under similar political contexts especially in developing countries.     

Is private rental an option for urban housing provision in Hungary?

By 1998, 91 percent of all housing units in Hungary were occupied by owners –an extremely high percentage by international standards. Today's Hungarian housing politicians, whose anti-rental convictions stem from the experience of the previous regime, tend to disregard arguments about the consequences of this bias: the negative impact on mobility, the creation of a rigid housing market (lack of adaptability to the housing market), hardships in addressing social problems, conflicts between generations (obligations borne by elder generations) as well as the `compulsory' purchase of housing by younger generations and the drain of subsidies. There is extensive evidence that current Hungarian regulations are hostile to rental housing. With subsidies channeled to the ownership sector (housing construction benefits, interest subsidies, local subsidies, employer subsidies) as well as tax relief (purchase of privately owned housing, savings-linked subsidies, imputed rents), it is more expensive for households to rent than to buy or build housing. This leads to a distorted economic structure and a distorted use of society's resources. A housing policy based on modern economic theory pursues neutral subsidy and tax policies concerning ownership. Thus, from an economic point of view, there is no reason to prefer owner-occupied housing to rental housing. This paper explains why the private and public rental sectors are so small. But at a deeper level, the question is why private rented housing exists at all. The paper also explores related questions: who tend to rent out their units, why, for how long and how much; and who tend to rent these units, why do they rent them, and at what prices? The key policy issue is to define the basic impediments to the sector's expansion. On this basis, a new housing policy program can be formulated.     

From urban to regional planning in Latin America, 1920–50

Focusing upon a period during which the planning discipline emerged and was consolidated in Latin America from the 1920s through the 1950s, this article aims to identify some of the impulses behind the widening of the scope of planning activities undertaken by planners of capital cities, from the local and urban to the regional and territorial. The author uses a comparative perspective to analyze this tendency toward the enlargement of the territorial extent of the plan, interpreting it as part of the process through which Latin America’s urban modernization proceeded while also relating it to the epistemological and professional shift from urbanismo towards planificación and planejamento. While factors such as the emergence of planning offices in some capital cities and the emergence of the first courses in planning in university curricula are considered, the article focuses mainly on the the approaches of pioneers in Latin American planning to this transition, in particular Carlos Contreras and Hannes Meyer in Mexico City, Carlos della Paolera in Buenos Aires, Karl Brunner in Bogotá and Santiago de Chile, and Maurice Rotival in Caracas.     

Urban sustainability in developing countries’ megacities: modelling and predicting future urban growth in Lagos

In the first part of the paper urban sustainability issues in African countries are considered with a focus on urban growth. The need for urban management tools that are able to provide prospective scenarios is addressed. Urban simulations can represent a useful approach to an understanding of the consequences of current planning policies or their incompleteness. Simulations of future urban growth are usually quite difficult without tools that embrace the complexity of the urban system. The second part of this paper describes an urban growth simulation for the city of Lagos in Nigeria using a dynamic spatial model prototype. We propose a bottom-up approach, integrating land-use factors with a dynamic approach for modelling future urban land-use scenarios. The model for Lagos was calibrated and tested using measured time-series data on land-use, through a set of spatial metrics and Kappa (κ) coefficients. Afterwards, a twenty-year simulation was run until 2020. The simulation results are realistic and relatively accurate, confirming the effectiveness of the proposed model. This work was performed in the framework of the European Commission’s MOLAND project.     

Democratic design experiments in urban planning – navigational practices and compositionist design

In the field of urban planning, public participation and inclusion of citizens have been practised and researched for many years. However, a focus on co-creative urban planning practices seems to have gained more focus over the last decade and calls for new urban planning practices, which allow experimentation and imagination, and at the same time take its outset in the existing networks in the city (such as visions, strategies, regulations and practices) when planning for the future. In this article, we investigate how a compositionist design programme can be translated into the practices of urban planners. We find that the notion of ‘democratic design experiments’ in many ways meet the demands of the increasingly complex field of urban planning and set out to explore how such a design programme can be applied in practice. We suggest ‘navigational practice’ as a way of describing how urban planners deal with ‘drawing things together’ in urban space and introduce ‘sensitivity’, ‘staging’ and ‘mobilization’ as interconnected elements of this practice. We exemplify the significance of these navigational practices by analysing two democratic design experiments in the area of urban waste management in Copenhagen. The article concludes that compositionist design is a powerful contribution to the framing of urban planning projects and that navigational practice can be a productive way of operationalising democratic design experiments in the urban context.     

Why there? Developers' rationale for building social housing in the urban periphery in Latin America

Inadequate housing has become endemic to Latin American cities for over six decades. All that has changed has been who is going where. In the 1960s, the rural poor who came to the city solved their housing needs by building their own informal settlements on peri-urban lands. Today, the urban poor relocate to peri-urban housing complexes built by the private sector with state subsidies. Why have these new housing units for low-income households been built in peri-urban areas? This paper examines some of the mechanisms behind the location of the urban poor in cities, with a specific focus on the role developers have played in the construction of affordable housing in peri-urban areas of Brazil and, Mexico. The paper explores these mechanisms through interviews with affordable housing developers. We found that economies of scale – and not land prices – explain developers' preference for building in peripheral areas. Initial savings that accrue to developers due to lower land prices in the periphery are offset by the cost of having to build basic onsite infrastructure. Plus, large lots – which are available almost exclusively in urban peripheries – enable developers to achieve significant cost savings because these large lots make it possible for developers to build more than 500 units. In addition, weaker municipal regulations and fewer bidders, both of which are typical for projects in difficult-to-access peripheral locations, make for a shorter and easier approval process for these large housing projects.     

Do internal migrants suffer from housing extreme overcrowding in urban China?

Housing deprivation is central to economic deprivation. Identifying disadvantaged group(s) suffering from housing deprivation is a necessary step before the government can design effective housing assistance programmes. Using a nationwide micro-level data-set from the Chinese Family Panel Studies, we evidence the disadvantage that internal migrants face related to extreme overcrowding. We find that renters, whether natives or internal migrants, are more likely to suffer extreme overcrowding than homeowners, nationally and in most Chinese regions. However, both rural and urban migrants are less likely to be owner-occupiers than native residents. By comparing homeowners vs. renters, we further discover that migrant homeowners are less likely to suffer extreme overcrowding than the native residents of China’s cities. Conversely internal migrant renters face the highest odds to live in extremely overcrowded dwellings. Overall, findings suggest that the Chinese government needs pay special attention to improve internal migrant tenants’ living condition, particularly so for those renting.     

The birth of ‘land use planning’ in American urban planning

Although the concept of ‘land use planning’ is now firmly enmeshed in American urban planning, its meaning still remains vague. This paper aims to clarify the meaning by examining the historical development of land use planning in the USA. At the beginning of the twentieth century, city planners viewed a city as an organic unit of public facilities. While city planning thereafter provided potential elements of land use planning, such as zoning, zoning surveys and land use classification systems, the idea of land use planning itself was actually derived from rural county planning and was initially utilized in urban county planning as a guide for zoning in the 1930s. After bringing about a change in the way cities were viewed, that is, as a pattern of land use and population density, land use planning was further employed as a guide for urban redevelopment policies in the 1940s, and finally reaching full integration into city planning in the 1950s and 1960s.     

Priority pollutants in urban stormwater: Part 2 – Case of combined sewers

This study has evaluated the quality of combined sewer overflows (CSOs) in an urban watershed, such as Paris, by providing accurate data on the occurrence of priority pollutants (PPs) and additional substances, as well as on the significance of their concentrations in comparison with wastewater and stormwater. Of the 88 substances monitored, 49 PPs were detected, with most of these also being frequently encountered in wastewater and stormwater, thus confirming their ubiquity in urban settings. For the majority of organic substances, concentrations range between 0.01 and 1 μg l^?1, while metals tend to display concentrations above 10 μg l^?1. Despite this ubiquity, CSO, wastewater and stormwater feature a number of differences in both their concentration ranges and pollutant patterns. For most hydrophobic organic pollutants and some particulate-bound metals, CSOs exhibit higher concentrations than those found in stormwater and wastewater, due to the contribution of in-sewer deposit erosion. For pesticides and Zn, CSOs have shown concentrations close to those of stormwater, suggesting runoff as the major contributor, while wastewater appears to be the main source of volatile organic compounds. Surprisingly, similar concentration ranges have been found for DEHP and tributyltin compounds in CSOs, wastewater and stormwater. The last section of this article identifies substances for which CSO discharges might constitute a major risk of exceeding Environmental Quality Standards in receiving waters and moreover indicates a significant risk for PAHs, tributyltin compounds and chloroalkanes. The data generated during this survey can subsequently be used to identify PPs of potential significance that merit further investigation.