Human mobility networks reveal increased segregation in large cities

© 2023. The Author(s)..

A long-standing expectation is that large, dense and cosmopolitan areas support socioeconomic mixing and exposure among diverse individuals1-6. Assessing this hypothesis has been difficult because previous measures of socioeconomic mixing have relied on static residential housing data rather than real-life exposures among people at work, in places of leisure and in home neighbourhoods7,8. Here we develop a measure of exposure segregation that captures the socioeconomic diversity of these everyday encounters. Using mobile phone mobility data to represent 1.6 billion real-world exposures among 9.6 million people in the United States, we measure exposure segregation across 382 metropolitan statistical areas (MSAs) and 2,829 counties. We find that exposure segregation is 67% higher in the ten largest MSAs than in small MSAs with fewer than 100,000 residents. This means that, contrary to expectations, residents of large cosmopolitan areas have less exposure to a socioeconomically diverse range of individuals. Second, we find that the increased socioeconomic segregation in large cities arises because they offer a greater choice of differentiated spaces targeted to specific socioeconomic groups. Third, we find that this segregation-increasing effect is countered when a city's hubs (such as shopping centres) are positioned to bridge diverse neighbourhoods and therefore attract people of all socioeconomic statuses. Our findings challenge a long-standing conjecture in human geography and highlight how urban design can both prevent and facilitate encounters among diverse individuals.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:624

Enthalten in:

Nature - 624(2023), 7992 vom: 01. Dez., Seite 586-592

Sprache:

Englisch

Beteiligte Personen:

Nilforoshan, Hamed [VerfasserIn]
Looi, Wenli [VerfasserIn]
Pierson, Emma [VerfasserIn]
Villanueva, Blanca [VerfasserIn]
Fishman, Nic [VerfasserIn]
Chen, Yiling [VerfasserIn]
Sholar, John [VerfasserIn]
Redbird, Beth [VerfasserIn]
Grusky, David [VerfasserIn]
Leskovec, Jure [VerfasserIn]

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Volltext

Themen:

Journal Article

Anmerkungen:

Date Completed 04.01.2024

Date Revised 28.03.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1038/s41586-023-06757-3

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM365218731