Exploring the associations between cooling centre accessibility and marginalization in Montreal,Toronto, and Vancouver,Canada

Cooling centres provide respite, safety, and social support during extreme heat events for populations that do not have the resources to own or operate in-home air conditioning. The objective of this study was to measure the spatial accessibility of cooling centres and analyze the associations between cooling centre access and marginalization in Montreal, Toronto, and Vancouver, Canada. The potential spatial accessibility of cooling centres within a 15-minute walk was measured at the dissemination area scale using the two-step floating catchment area method. A two-stage modelling approach was used to analyze the associations between cooling centre access and marginalization. Approximately 62%, 58%, and 54% of the populations in Montreal, Toronto, and Vancouver had access to at least one cooling centre. In Montreal and Vancouver, high marginalization areas were more likely to have cooling centre access than low marginalization areas. Of the areas with cooling centre access, smaller access scores were observed in areas with high residential instability. Approximately one-fifth of the areas in each city had no cooling centre access and high marginalization, and may be considered for future cooling centres or programs that improve accessibility to existing centres.     

BOOM AND BUST: THE EFFECTS OF HOUSE PRICE INFLATION ON HOMEOWNERSHIP PATTERNS IN MONTREAL, TORONTO, AND VANCOUVER

it is widely supposed that urban house price inflation has recently put ownership beyond the reach of many potential home buyers. In fact, between 1974 and 1982 this was not uniformly the case in Canada's three largest cities. Homeownership rates declined in Vancouver, held steady in Toronto, and increased in Montreal. In Montreal all social classes shared in an ownership boom. In Toronto, the middle class fared well, blue-collar workers rather poorly. In Vancouver, blue-collar workers held their own, but the middle class lost ground. Everywhere the relative position of the self-employed declined. The geographical impact of house price inflation has been variable while the social and political implications merit study. There is a need for synthetic studies of specific cities.     

Residential segregation of visible minorities in Canada's gateway cities

Although the influx of visible minority immigrants has created an atmosphere of diversity and multicultural‐ism in Canada's three major gateway cities, Montreal, Toronto and Vancouver, immigration has also produced metropolitan landscapes of fragmentation and ethnic separation. The objective of this study is to compare the residential patterns of visible minority populations in Montreal, Toronto and Vancouver, using a rigorous and consistent method that examines the temporal and spatial nature of segregation and its links to local housing characteristics. The paper reviews the literature on models of urban separation, and ethnic and visible minority segregation in Canadian cities, and develops four propositions regarding expected residential patterns and concentrations of visible minorities. It tests these propositions using an analysis of 1986, 1991 and 1996 Census data, in which residential patterns in the three cities are examined and related to the distribution of different types of housing. Our findings confirm previous research results of fragmentation and dispersal, but we uncover decisive differences between cities. Bien que l'afflux d'immigrants appartenant à des minorités visibles ait créé un climat de diversité et de multiculturalisme dans trois des principales portes d'entrée au Canada, à savoir Montréal, Toronto, Vancouver, il n'en reste pas mains que cet afflux a aussi produit des paysages métropolitains de fragmentation et séparation ethniques. L'objectifde cette étude est de comparer les modèles résidentiels des populations minoritaires visibles de Montréal, Toronto et Vancouver; pour ce, nous avons utilisé une méthodologie rigoureuse qui examine la nature de cette ségrégation, du point de vue temporel et spatial ainsi que ses liens avec les caractéristiques des habitats locaux. L'article fait une recension des écrits portant sur les modèles de séparation urbaine, ainsi que sur la ségrégation des minorités ethniques et visibles. II développe quatre propositions concernant les modèles résidentiels et les concentrations de minorités visibles anticipés. L'article vérifie ces propositions à partir de l'analyse des données du recensement des années 1986, 1991 et 1996, dans lesquelles les modèles résidentiels étaient étudiés et mis en rapport avec la distribution des différents types d'habitat. Nos conclusions confirment les résultats de recherches antérieures sur la fragmentation et la dispersion, mais dévoilent en même temps des différences cruciales entre les villes.     

Esquisses géographiques des récits cinématographiques Canadiens contemporains

Films carry an original geographic discourse. Beyond the vision of an author, they often reflect a society's perspective on territories. The goal of this research is to study the geographic discourse developed by Canadian cinema through an analysis of the places structuring Canadian cinematographic narratives. This analysis is based on the systematic study of a selection of 46 contemporary Canadian films. These films have been transformed into a database of 2200 places using an original geographic reading grid. Analysis of these places identifies the existence of territories under‐ and over‐represented by Canadian cinema, as well as territories of consensus and divergence that exist between different categories of Canadian cinema such as Quebecois, anglophone, and hybrid. Some interesting results include the general lack of interest in the southern hemisphere—notably Latin America—as well as in the Nordic territories (outside of First Nations cinema). It is also interesting to note the quasi‐absence of Vancouver on the screen, while Toronto and the United States appear recurrently. But the most striking result is probably the profound divergence in the way Canadian cinema treats the province of Quebec in general, and the city of Montreal in particular. Montreal is indeed the perfect example of a space of divergence: the city is heavily represented in Quebecois films, but completely ignored in the rest of Canadian cinematographic production. This deep opposition illustrates the importance of downtown Montreal as a symbolic space of Quebec national identity.     

WHY ARE URBAN TRAVEL TIMES SO STABLE?

Personal travel time in U.S. urban areas has been stable, clashing with the assertion that urban sprawl greatly lengthens travel. Average commute time rises by 7.7 percent with each cross‐sectional doubling of Metropolitan Statistical Area (MSA) jobs. Using the RELU‐TRAN structural computable general equilibrium model of the Chicago MSA, we simulate the equilibrium effects of a 24 percent population increase projected from 2000 to 2030 by the Chicago Metropolitan Agency for Planning. If no new road capacity is added, then congestion per mile increases. Although the urbanized land area increases by 19 percent, indicating sprawl, the vehicle miles traveled (VMT) per car‐trip decreases by 1.31 percent and the VMT per car‐trip to work decreases by 2.78 percent. Car travel time increases by only 6.25 percent and commuting time by only 4.54 percent, from 30.3 minutes in 2000 to 31.7 in 2030 or 3.4 seconds per year. We further explore the effects of new road capacity, gasoline prices, public transit speed, fuel economy gains, limits on suburban construction, and importantly, the cross‐elasticity of public transit use with respect to car times. The availability of public transportation, economizing on nonwork travel, and land use adjustments that increase job‐residence proximity keep times stable.     

A spatial analysis of small- and medium-sized information technology firms in Canada and the importance of local connections to institutions of higher education

As part of community/regional development policy, governments in Canada attempt to create conditions that stimulate the formation of high-technology clusters and, in so doing, often encourage firm–university/college liaisons. Information technology (IT) is an important segment of the high-technology sector, and small- and medium-sized Canadian IT firms are disproportionately attracted to large metropolitan areas (with Toronto, Ottawa–Hull, Vancouver, Calgary, Montréal, Kitchener and Edmonton being the most noteworthy). A nearest neighbour analysis suggests that small- and medium-sized IT firms are clustered within the metropolitan setting, and a nearest neighbour hierarchical spatial clustering technique demonstrates that intra-urban IT agglomerations can be objectively identified. The linkages between small- and medium-sized IT firms and higher education institutions are, on average, not strongly entrenched within Canada's IT culture, although many of these firms still connect with universities or colleges through co-operative programs and other means of employee recruitment and via general networking with faculty members. Thus, governments may be able to support IT cluster formation by encouraging firm–university/college connections that centre on student participation.     

A NODAL STRUCTURE FOR A SET OF CANADIAN CITIES USING GRAPH THEORY AND NEWSPAPER DATELINES*

The relative importance and the spheres of influence of the urban centres within some specified region, such as a country, are intriguing topics of investigation. Webber (1964) indicated that the ordering of centres within a country is not possible, since “the spatial extent of each [urban] realm is ambiguous, shifting instantaneously as participants in the realm's many interest-communities make new contacts, trade with different friends, or read different publications.’ We suspect, however, that there is considerable order in the communication links among the larger centres within a country. For example, Canada's leaders in business, governments, and the arts tend to move through a hierarchy of centres to end up in Toronto, Ottawa, Montreal, Vancouver, or some other large city, depending upon the particular field in which they work. All urban centres are linked to Ottawa, which is at the apex of political power, and to large urban centres, such as Toronto and Montreal, which predominate in the economic realm. The major purpose of this paper is to derive a nodal structure for seventeen major Canadian cities, based on newspaper datelines. By utilizing these particular information flows, the analyses also shed light on possible differences between the anglophone and francophone communications networks.     

Culturally clustered or in the cloud? How amenities drive firm location decision in Berlin

Creative firms are neither capital‐ nor land‐intensive in production. They predominantly rely on creative and specialized labor and, assuming a strong competition for workers, are therefore increasingly dependent on the location of their (potential) employees. If these creative and highly qualified employees are attracted by consumption amenities such as bars, clubs, and restaurants, then it follows that these same amenities may determine the location of creative service firms. I investigate this hypothesis by examining whether Berlin Internet start‐up firms locate in urban amenity‐rich places. Identification builds on the fall of the Berlin Wall. A 1 percent increase in amenity density raises the probability of a start‐up location by almost 2 percent. A comparison with other service industries suggests that amenities are significant to the location choice of creative sectors, whereas no effect can be observed for nonreative firms.     

土地利用的八维空间解析

土地的本质是一定范围的空间,土地利用是在一定范围的空间内安排土地用途和土地功能的活动集合。解构土地利用空间维度,构建土地利用从低维到高维转变的土地利用思想,有利于拓展现代土地利用创新理念。基于主题分析法的研究表明：①土地利用存在八个维度的拓展方向,分别是聚点发展、轴线开发、平面发展、立体发展、分时利用、混合用途、功能叠加和空间共享;②土地利用维度可归纳为空间、时间和功能三个层面,并且各维度之间存在较强的关联性;③依据土地利用维度从低到高,以聚点发展为初始维,构建土地利用的八维空间理念。土地利用八维空间理念的明晰,有利于增益人们对土地用途和土地功能空间配置和组合的认知,从而有利于现代土地利用的创新实践。     

EXTERNALITIES AND PARTIAL TAX REFORM: DOES IT MAKE SENSE TO TAX ROAD FREIGHT (BUT NOT PASSENGER) TRANSPORT?*

ABSTRACT Externalities such as pollution and road congestion are jointly produced by the use of intermediate inputs by firms and the consumption of final goods by households. To cope with such externalities, policy proposals often suggest partial tax reforms. This paper uses a simple general equilibrium model to explore the effects of a reform of taxes on freight transport in a second‐best setting. The theoretical model shows that the welfare effect of higher freight taxes is positive, unless passenger transport is severely under‐taxed and the tax reform attracts substantially more passenger transport. Moreover, the optimal freight tax may be below or above marginal external cost. Budgetary neutral tax reform exercises with a numerical simulation model for the U.K. suggest that, under a wide variety of parameter values, higher freight transport taxes are indeed welfare increasing. The welfare gain of freight tax reform rises with the level of the passenger tax, but the optimal freight tax declines at higher taxes on passenger transport. Substantial net benefits of tax reform are obtained only under labor tax recycling of the revenues.     

Action research and reducing the vulnerability of peri‐urban agriculture: a case study from the Montreal Region

Important pressures still increase the vulnerability of peri‐urban farming despite initiatives to protect agricultural land and activities since the mid‐1960s in several jurisdictions in the USA and Canada. Often, farmland is still removed from agricultural reserves for the ‘good of society’ (for example, creating industrial parks). In 2008, an action research project was initiated to attempt to reduce agricultural vulnerability in several peri‐urban and rural areas near Montreal by emphasising the importance of the appropriation of the value of these farmlands by non‐farm citizens and actors. The action research roles involved accompanying the farmers, facilitating meetings, mobilising non‐farm actors, and informing farmers of possibilities when asked to do so. In this article, one specific project is analysed in Senneville (in the west of Montreal Island). While the project was initiated by the farmers to guarantee their long‐term future, they also sought to involve other, mostly non‐agricultural, actors. In a colloquium, a collective vision for the project was constructed, integrating other functions of farmland such as conservation and leisure activities. Many meetings were organised over a three‐year period and formal presentations were made to the municipality. The project is ongoing, including new farm operations and the reinforcement of local markets for marketing mainly organic produce. The area is now an integral part of an emerging ‘green belt’ of the Montreal agglomeration and is already part of a ‘green coalition’ of both urban and peri‐urban actors (farmers and non‐farmers), and an emerging food system movement which represents a more holistic approach to food production.     

From Simplicity to Complexity: The Changing Geography of Land Vulnerability to Degradation in Italy

Although territorial disparities in land quality are commonly observed in Mediterranean‐type ecosystems, how different geographical gradients impact the changing distribution of land vulnerable to degradation over time and space is poorly investigated in southern Europe. The present study assesses the spatial distribution of vulnerable land according to a composite index that describes the degree of land vulnerability to degradation in Italy along eight gradients during two time periods (1960–1990 and 1990–2010), representing distinct socio‐economic and environmental conditions. While the degree of land vulnerability increased at similar paces from 1960 to 1990 and from 1990 to 2010, the spatial distribution of vulnerable land changed considerably. From 1960 to 1990, the area of vulnerable lands increased in coastal areas, lowlands, and areas with moderately high population density, mainly owing to the increased climate aridity. By contrast, peri‐urban areas experienced, especially in northern Italy, the highest vulnerability from 1990 to 2010 owing to increased human pressure on land generating, e.g. land‐use changes. Results indicate that the importance of the gradients shaping the distribution of vulnerable land in Italy is reflected in the (changing) role of climate, vegetation cover, and human pressure as factors predisposing land to degradation. Finally, policy implications of the changing geography of vulnerable land in the Mediterranean region are discussed.     

虚拟腹地：中国大陆口岸地位的度量与解释

口岸是对外开放的门户,支撑起了中国大陆全方位对外开放的格局。章引入虚拟腹地的概念,通过分析进出口商品流向,定量描述口岸对内影响能力,确定口岸的相对地位。并以虚拟腹地面积和通过口岸的进出口总量两个指标对39个口岸子群进行了类型划分。基于沿海、沿边口岸在整个开放体系中的重要性,章进一步分析了沿海、沿边各口岸群的相对地位和对内联系腹地的经济特征。     

Politics Within and Without — The Origins and Development of a Rangelands Landcare Group

The 1990s saw a resurgence of interest in land‐use reform in the arid and semi‐arid rangelands of Australia. Scientists and conservationists called for a reassessment of land use in areas now used for extensive grazing of cattle and sheep. Landcare groups formed by pastoralists were criticised for deflecting resources away from questions of land‐use reform. While Landcare groups in agricultural regions of Australia have been subject to considerable assessment, analysis of rangelands Landcare has tended to revolve around questions of land use to the neglect of analysis of the operation of the groups themselves. Based on a case study of a pastoral Landcare group in the rangelands, the research reported in this paper found that pastoral Landcare in the rangelands has comparable outcomes to Landcare elsewhere in terms of the creation of opportunities for improved communication and learning among landholders. In addition, this group has developed from an emphasis on single‐issue projects towards multi‐faceted projects focussed on social as well as ecological sustainability. The analysis also found that political considerations were significant in the forma‐tion of the group and remained important for some pastoralists at the time of fieldwork. Finally, rangelands Landcare in this case study has provided a vehicle for reformist pastoralists and their associates to work actively towards influencing their peers to acknowledge land management problems and to reflect on their management practices.     

A NEW SPATIAL MULTIPLE DISCRETE‐CONTINUOUS MODELING APPROACH TO LAND USE CHANGE ANALYSIS

This paper formulates a multiple discrete‐continuous probit (MDCP) land use model within a spatially explicit economic structural framework for land use change decisions. The spatial MDCP model is capable of predicting both the type and intensity of urban development patterns over large geographic areas, while also explicitly acknowledging geographic proximity‐based spatial dependencies in these patterns. At a methodological level, the paper focuses on specifying and estimating a spatial MDCP model that allows the dependent variable to exist in multiple discrete states with an intensity associated with each discrete state. The formulation also accommodates spatial dependencies, as well as spatial heterogeneity and heteroskedasticity, in the dependent variable, and should be applicable in a wide variety of fields where social and spatial dependencies between decision agents (or observation units) lead to spillover effects in multiple discrete‐continuous choices (or states). A simulation exercise is undertaken to evaluate the ability of the proposed maximum approximate composite marginal likelihood (MACML) approach to recover parameters from a cross‐sectional spatial MDCP model. The results show that the MACML approach does well in recovering parameters. An empirical demonstration of the approach is undertaken using the city of Austin parcel level land use data.     

Spatial and environmental impacts on adverse birth outcomes in Ontario

This study assesses the overall spatial variations and neighbourhood‐level “hot spots” of low birth weight and preterm birth incidence within three public health units in Ontario, Canada. The analysis uses a stepwise approach of intra‐class correlation analysis, a spatial scan statistic, and multilevel spatial modeling. Results show that neighbourhood level variation accounts for only 2–3 percent of the total variation of adverse birth outcomes in the study area. However, strong spatial autocorrelation is observed at the neighbourhood level, and spatial clusters of relatively high adverse birth outcome rates exist in areas that are associated with environmental risks, including pollution sources and proximity to highways. Thus, although estimated neighbourhood impacts on adverse birth outcomes are small compared with those of individual‐level risks, local high potential environmental risk areas are identifiable. Environmental surveillance and spatial statistical analysis should be conducted regularly by local health authorities to identify and monitor the impact of environmental changes on health in general and on birth outcomes in particular. Specific community‐oriented health interventions may be required to reduce observed local health impacts.     

Löschian Spatial Competition in an Emerging Retail Industry

Löschian competition is traditionally thought to lead to a spatial equilibrium in which firms enter an industry and disperse across geographic space until each firm earns insufficient excess profit to attract net new entrants. This paper assesses the appropriateness of Löschian analysis using video (movie) rental establishments in Toronto as a case example. The video rental business, as we know it today, began to take shape around 1980 and has since seen much turnover. The paper describes the changing pattern of single‐site and chain stores between 1982 and 1999. I use logistic regression to predict the survival of existing establishments. Using survivorship as a proxy for profit, the paper draws conclusions about the extent to which temporal changes in video store location correspond to the tenets of Löschian competition. The coexistence of chain and single‐site stores suggests that there are distinct market niches and that single‐site stores have used a “swarming” strategy to compete against chains. Conclusions are drawn about how the retail sector might evolve in the future because of the locational competition between chains and single‐site stores.     

Reconstruction of past backyard skating seasons in the Original Six NHL cities from citizen science data

This study conducted linear and change-point analyses of historical trends since 1942 in the length and number of days suitable for skating on backyard rinks in the “Original Six” National Hockey League cities of Boston, Chicago, Detroit, Montreal, New York, and Toronto. Analysis is based on the relationship between ambient air temperatures and the probability of skating, using thresholds identified through the RinkWatch citizen science project. In all cities, coefficient estimates suggest the number of high-probability skating days per winter is declining, with easternmost cities displaying notable declines and growing inter-annual variability in skating days in recent decades. Linear analysis shows a statistically significant decline in Toronto, with a step-change emerging in 1980, after which there is on average one-third fewer skating days compared with preceding decades. The outdoor skating season trends towards later start dates in Boston, Montreal, New York, and Toronto. Future monitoring of outdoor rinks provides an opportunity for engaging the public in identification of winter warming trends that might otherwise be imperceptible, and for raising awareness of the impacts of climate change.     

The changing nature of the peri‐urban zone in Africa: Evidence from Dar‐es‐Salaam,Tanzania

Research on the peri‐urban zones of African cities since the mid‐1980s has focused around three main themes, these being peri‐urban agriculture as a survival strategy, debates about the relative efficiencies of peri‐urban agriculture, and the question of production priorities. Drawing on recent evidence from Dar‐es‐Salaam in Tanzania, this paper suggests that a combination of structural adjustment measures and the eased economic crisis in Tanzania has changed conditions, the result of which has been the increasing commodification of land in the peri‐urban zone during the 1990s. This has turned the peri‐urban zone more into a zone of investment and economic opportunity, rather than a zone of survival, with the result that the poorer urban groups are being increasingly excluded. A further complication concerns confusion arising out of current Tanzanian land law, and particularly the tensions between customary and statutory law.