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Urban agglomeration

About: Urban agglomeration is a(n) research topic. Over the lifetime, 3337 publication(s) have been published within this topic receiving 50641 citation(s). The topic is also known as: urban & agglomeration. more


Open accessReportDOI: 10.3386/W9931
Gilles Duranton1, Diego Puga2Institutions (2)
Abstract: This handbook chapter studies the theoretical micro-foundations of urban agglomeration economies. We distinguish three types of micro-foundations, based on sharing, matching, and learning mechanisms. For each of these three categories, we develop one or more core models in detail and discuss the literature in relation to those models. This allows us to give a precise characterisation of some of the main theoretical underpinnings of urban agglomeration economies, to discuss modelling issues that arise when working with these tools, and to compare different sources of agglomeration economies in terms of the aggregate urban outcomes they produce as well as in terms of their normative implications. more

2,025 Citations

Open accessBook
02 May 2002-
Abstract: This book provides the first unifying analysis of the range of economic reasons for the clustering of firms and households Its goal is to explain further the trade-off between various forms of increasing returns and different types of mobility costs The main focus of the analysis is on cities, but it also explores the formation of other agglomerations, such as commercial districts within cities, industrial clusters at the regional level, and the existence of imbalance between regions more

1,439 Citations

Journal ArticleDOI: 10.1016/J.TECHSOC.2005.10.005
Barney Cohen1Institutions (1)
Abstract: The purpose of this paper is to provide a broad overview of the recent patterns and trends of urban growth in developing countries. Over the last 20 years many urban areas have experienced dramatic growth, as a result of rapid population growth and as the world’s economy has been transformed by a combination of rapid technological and political change. Around 3 billion people—virtually half of the world’s total population-now live in urban settlements. And while cities command an increasingly dominant role in the global economy as centers of both production and consumption, rapid urban growth throughout the developing world is seriously outstripping the capacity of most cities to provide adequate services for their citizens. Over the next 30 years, virtually all of the world’s population growth is expected to be concentrated in urban areas in the developing world. While much of the current sustainable cities debate focuses on the formidable problems for the world’s largest urban agglomerations, the majority of all urban dwellers continue to reside in far smaller urban settlements. Many international agencies have yet to adequately recognize either the anticipated rapid growth of small and medium cities or the deteriorating living conditions of the urban poor. The challenges of achieving sustainable urban development will be particularly formidable in Africa. q 2005 Elsevier Ltd. All rights reserved. more

Topics: Urbanization (67%), Urban density (64%), Urban planning (61%) more

1,386 Citations

Journal ArticleDOI: 10.1016/J.PROGRESS.2011.04.001
Shlomo Angel1, Jason Parent2, Daniel L. Civco2, Alexander Blei3  +1 moreInstitutions (4)
Abstract: Our study of the expansion of a representative sample of 30 cities showed that 28 of them expanded more than 16-fold during the twentieth century. More generally, cities are now expanding at twice their population growth rates, on average, and now cover almost 0.5% of the planet's land area. We created a new dataset comprising the universe of all 3646 named metropolitan agglomerations and cities that had populations in excess of 100,000 in the year 2000, their populations in that year, and their built-up area identified in the Mod500 map, currently the best of eight satellite-based global maps of urban land cover. Using this dataset, we estimated urban land cover in smaller cities and towns in all countries and calculated total urban land cover in every country in the year 2000. We then employed multiple regression models that could explain more than 90% of the variations in our urban land cover estimates amongst countries. Then, using U.N. urban population projections in combination with three realistic density change scenarios based on our previous global and historical study of densities, we projected urban land cover in every country and world region from 2000 to 2050. According to our medium projection, urban land cover in developing countries will increase from 300,000 km2 in 2000 to 770,000 km2 in 2030 and to 1,200,000 km2 in 2050. Containing this expansion is likely to fail. Minimal preparations for accommodating it – realistic projection of urban land needs, the extension of metropolitan boundaries, acquiring the rights-of-way for an arterial road grid that can carry infrastructure and public transport, and the selective protection of open space from incursion by formal and informal land development – are now in order. more

Topics: Urbanization (59%), Land development (59%), Urban agglomeration (54%) more

668 Citations

Open accessPosted Content
Abstract: This degree of geographic concentration of individual manufacturing industries in the US has declined only slightly in the last twenty years At the same time, new plant births, plant expansions, contractions and closures have shifted large quantities of employment across plants, firms and locations This paper uses data from the Census Bureau's Longitudinal Research Database to examine how relatively stable levels of geographic concentration emerge from this dynamic process While industries agglomeration levels tend to remain fairly constant we find that there is a greater variation in the locations of these agglomerations We then decompose aggregate concentration changes into portions attributable to plant births, expansions, contractions, and closures, and find that the location choices of new firms and differences in growth rates have played the most significant role in reducing levels of geographic concentration, while plant closures have tended to reinforce agglomeration Finally, we look at coagglomeration patterns to test three of Marshall's theories of industry agglomeration: (1) agglomeration saves transport costs by proximity to input suppliers or final consumers, (2) agglomeration allows for labor market pooling, and (3) agglomeration facilitates intellectual spillovers While there is some truth behind all three theories, we find that industrial location is far more driven by labor mix than by any of the other explanatory variables more

659 Citations

No. of papers in the topic in previous years

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Topic's top 5 most impactful authors

Peter Nijkamp

19 papers, 197 citations

J. Vernon Henderson

13 papers, 1.2K citations

Yoshitsugu Kanemoto

8 papers, 183 citations

Karima Kourtit

8 papers, 131 citations

Dan S. Rickman

6 papers, 522 citations

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