Human activities, such as research, innovation and industry, concentrate disproportionately in large cities. The ten most innovative cities in the United States account for 23% of the national population, but for 48% of its patents and 33% of its gross domestic product. But why has human activity become increasingly concentrated? Here we use data on scientific papers, patents, employment and gross domestic product, for 353 metropolitan areas in the United States, to show that the spatial concentration of productive activities increases with their complexity. Complex economic activities, such as biotechnology, neurobiology and semiconductors, concentrate disproportionately in a few large cities compared to less--complex activities, such as apparel or paper manufacturing. We use multiple proxies to measure the complexity of activities, finding that complexity explains from 40% to 80% of the variance in urban concentration of occupations, industries, scientific fields and technologies. Using historical patent data, we show that the spatial concentration of cutting-edge technologies has increased since 1850, suggesting a reinforcing cycle between the increase in the complexity of activities and urbanization. These findings suggest that the growth of spatial inequality may be connected to the increasing complexity of the economy.

https://hal.archives-ouvertes.fr/hal-03058602/document

Complex economic activities concentrate in large cities.

American cities today are simultaneously the same and different from Wilson’s classic portrayal in The Truly Disadvantaged ([1987] 2012), first published over 30 years ago. Concentrated poverty and...

https://journals.sagepub.com/doi/pdf/10.1177/0042098018795363

Neighbourhood effects and beyond: Explaining the paradoxes of inequality in the changing American metropolis:

Why do some economic activities agglomerate more than others? And, why does the agglomeration of some economic activities continue to increase despite recent developments in communication and transportation technologies? In this paper, we present evidence that complex economic activities concentrate more in large cities. We find this to be true for technologies, scientific publications, industries, and occupations. Using historical patent data, we show that the urban concentration of complex economic activities has been continuously increasing since 1850. These findings suggest that the increasing urban concentration of jobs and innovation might be a consequence of the growing complexity of the economy.

Complex Economic Activities Concentrate in Large Cities

Abstract Smart city-policy makers and technology vendors are increasingly stating they want to bring about citizen-centered smart cities. Yet, it often remains unclear what exactly that means, and how citizens are envisaged as actors in smart cities. This article wants to contribute to this discussion by exploring the relation between smart cities and citizenship. It aims to do this by introducing a heuristic scheme that brings out the implied notions of citizenship in three distinct sets of smart city visions and practices: The Control Room envisages the city as a collection of infrastructures and services; The Creative City views the city from the perspective of (economic) geography and ponders on local and regional systems of innovation; The Smart Citizens discourse addresses the city as a political and civic community. These smart city discourses are mapped against two visions on citizenship and governance taken from political philosophy. A `republican' perspective with strong presence in social-democratic countries is contrasted with a libertarian one, most prominent in Silicon Valley approaches to smart city technologies. This provides a scheme to reflect on potential benefits and downsides if a specific smart city discourse would develop. Instances of smart cities may promote notions of citizenship that are based on consumer choice and individual responsibility, alternatively they could also reinforce collective responsibilities towards the common good of society.

The citizen in the smart city. How the smartcity could transform citizenship

The 21st century economy is knowledge-intensive, creative and flourishing in larger urban centres. Less is known about how smaller urban centres are faring in this new economy. This research aims t...

Coworking spaces in mid-sized cities: A partner in downtown economic development:

Richard Florida has proved a lightning-rod for critique within urban studies since the publication of his widely influential book The Rise of the Creative Class in 2002. His seductive message spell...

/pdf/the-new-urban-crisis-how-our-cities-are-increasing-1ms73wrbr9.pdf

Sidra Ahmed

Papers

The New Urban Crisis: how our cities are increasing inequality, deepening segregation, and failing the middle-class – and what we can do about it

Isolation and evaluation of significant antibacterial fraction of methanol and its derived fractions from the leaves extract of Zygophyllum simplex