How Should We Measure City Size Theory And Evidence Within And Across Rich And Poor Countries

It is obvious that holding city population constant, differences in cities across the world are enormous. Urban giants in poor countries are not large using measures such as land area, interior space or value of output. These differences are easily reconciled mathematically as population is the product of land area, structure space per unit land (i.e., heights), and population per unit interior space (i.e., crowding). The first two are far larger in the cities of developed countries while the latter is larger for the cities of developing countries. In order to study sources of diversity among cities with similar population, we construct a version of the standard urban model (SUM) that yields the prediction that the elasticity of city size with respect to income could be similar within both developing countries and developed countries. However, differences in income and urban technology can explain the physical differences between the cities of developed countries and developing countries. Second, using a variety of newly merged data sets, the predictions of the SUM for similarities and differences of cities in developed and developing countries are tested. The findings suggest that population is a sufficient statistic to characterize city differences among cities within the same country, not across countries.

It is obvious that holding city population constant, differences in cities across the world are enormous. Urban giants in poor countries are not large using measures such as land area, interior space or value of output. These differences are easily reconciled mathematically as population is the product of land area, structure space per unit land (i.e., heights), and population per unit interior space (i.e., crowding). The first two are far larger in the cities of developed countries while the latter is larger for the cities of developing countries. In order to study sources of diversity among cities with similar population, we construct a version of the standard urban model (SUM) that yields the prediction that the elasticity of city size with respect to income could be similar within both developing countries and developed countries. However, differences in income and urban technology can explain the physical differences between the cities of developed countries and developing countries. Second, using a variety of newly merged data sets, the predictions of the SUM for similarities and differences of cities in developed and developing countries are tested. The findings suggest that population is a sufficient statistic to characterize city differences among cities within the same country, not across countries.

The answers to the questions of why and how people live where they live as well as how they maintain and integrate with one another are fundamental human settlement issues rooted in history and culture. Human settlements are historically linked to resource availability, fortification, and the mythos of civilizations. Cities play a central role in redefining the interface between human beings and nature. They have revolutionized the human experience by taming natural surroundings and building environments that are human-centric—often narrowing human life outside the experience of wilderness or the untamed. This book is divided into three parts, it examines urban development trends, explores perspectives in energy efficiency and agriculture security, and considers policy development and future scenarios in human-nature relations. It is a compendium of multidisciplinary work that challenges the directions of modernity and offers reference to alternatives. Authors come from a diverse background and international context to address common overarching theories facing current geography-specific problems. An interconnected overtone of the book attempts to link accelerated urbanization and settlement location to how societies are maintained and integrated. Human settlements are shaped by human ecology and the relationship between humans and their interaction with their environment. Two sectors central to human survival are specifically explored: energy and agriculture. Cutting-edge, smart development looks at the latest findings that reflect the on-going debate facing these sectors. A human settlement metric is envisioned in terms of the past, present, and future. This book is a unique attempt to combine a rethinking about human settlements for scientists, policy-makers, public officials, and people committed to improving urban life, society-wide. Possible agents to resolving human settlement problems include international cooperation and various mechanisms that interlace the international community. Methodological and applied aspects of sustainable management focus on topics such as adaptive knowledge sharing, renewable energy, climate change, agricultural planning, and policy development. An emphasis on scientific and technological advancement, from a bottom-up mapping of society, elucidates a better understanding of the role of knowledgeable societies in which need is considered alongside how such need can be sustained—advancing towards a more promising future.

Digital connectivity, including through the modern cellular network technologies, is expected to play a key role for the Future of Work in sub-Saharan Africa (SSA). We estimate the cost of introducing a full-scale 4G network by 2025 in SSA and an operable 5G network by 2040. We adapt the costing model of Lombardo (2019) by accounting for the significant demographic transformation and rapid urbanization in SSA. We use the WorldPop and GADM databases and the UN’s medium-variant population projections to project the population densities at the highest level of administrative division for each SSA country in 2025 and 2040. For full 4G connectivity, the required capital and operational costs stands approximately at US$14 billion by 2025 and for 5G connectivity, costs amount to US$57 billion in 2040, conditional on having the 4G in place by 2025. These costs roughly translate to 8.4 percent of annual subscriber income, on a median basis, by 2025 for 4G and 4.9 percent of subscriber income by 2040 for 5G. Having the infrastructure in place is not sufficient to bridge the mobile Digital Divide. In addition, policies are needed to address affordability and knowledge gaps.

We live in the ‘urban century’. Cities all over the world – in both developing and developed countries – display complex evolutionary patterns. Urban Empires charts the backgrounds, mechanisms, drivers, and consequences of these radical changes in our contemporary systems from a global perspective and analyses the dominant position of modern cities in the ‘New Urban World’. This volume views the drastic change cities have undergone internationally through a broad perspective and considers their emerging roles in our global network society. Chapters from renowned scholars provide advanced analytical contributions, scaling applied and theoretical perspectives on the competitive profile of urban agglomerations in a globalizing world. Together, the volume traces and investigates the economic and political drivers of network cities in a global context and explores the challenges over governance that are presented by mega-cities. It also identifies and maps out the new geography of the emergent ‘urban century’. With contributions from well-known and influential scholars from around the world, Urban Empires serves as a touchstone for students and researchers keen to explore the scientific and policy needs of cities as they become our age’s global power centers.

Originally published in 1993, Metropolis 2000 analyses 20th century metropolitan development and planning under the economic and environmental conditions of the world’s regions. Attempts to achieve the physical integration of the city without economic equality have failed. The book advances the principle of ‘integrated diversity’ which emphasises linking neighbourhood planning with a broader vision of the planned metropolis and applies a political economy approach, and argues for a new form of pro-urban thinking. The book argues that the basis for a humane approach to city planning is viewing the metropolis as a beneficial accompaniment to national independence, equality and social progress.

The volumes in this set, originally published between 1970 and 1998, draw together research by leading academics in the area of urban planning, and provide a rigorous examination of related key issues. The volumes examine teaching, urban markets, planning, transport planning, poverty, politics, forecasting techniques and an examination of the inner city in Europe and the US, whilst also exploring the general principles and practices of planning. This set will be of particular interest to students of sociology, geography, planning and urbanization respectively.

This report provides an assessment of spatial inequalities and segregation in cities and metropolitan areas from multiple perspectives. The chapters in the report focus on a subset of OECD countries and non-member economies, and provide new insights on cross-cutting issues for city neighbourhooods.