From global scaling to the dynamics of individual cities

Proceedings of the National Academy of Sciences of the United States of America
Jules Depersin, Marc Barthelemy

Abstract

Scaling has been proposed as a powerful tool to analyze the properties of complex systems and in particular for cities where it describes how various properties change with population. The empirical study of scaling on a wide range of urban datasets displays apparent nonlinear behaviors whose statistical validity and meaning were recently the focus of many debates. We discuss here another aspect, which is the implication of such scaling forms on individual cities and how they can be used for predicting the behavior of a city when its population changes. We illustrate this discussion in the case of delay due to traffic congestion with a dataset of 101 US cities in the years 1982-2014. We show that the scaling form obtained by agglomerating all of the available data for different cities and for different years does display a nonlinear behavior, but which appears to be unrelated to the dynamics of individual cities when their population grows. In other words, the congestion-induced delay in a given city does not depend on its population only, but also on its previous history. This strong path dependency prohibits the existence of a simple scaling form valid for all cities and shows that we cannot always agglomerate the data for ma...Continue Reading

References

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Citations

Nov 28, 2019·Journal of the Royal Society, Interface·Marc Barthelemy
Feb 6, 2020·Journal of the Royal Society, Interface·Luís M A BettencourtMarcus J Hamilton
Jun 27, 2019·Proceedings of the National Academy of Sciences of the United States of America·Marc Keuschnigg
Sep 13, 2020·Science Advances·Yanyan XuMarta C González
Oct 24, 2019·Physical Review. E·V Chuqiao YangDaniel M Abrams
Sep 3, 2020·Science Advances·Luis M A Bettencourt
Sep 17, 2020·Science Advances·Inho HongHyejin Youn
Jan 23, 2021·PloS One·Haroldo V RibeiroDiego Rybski
Nov 21, 2020·Scientific Reports·Carmen Cabrera-Arnau, Steven R Bishop
Dec 5, 2020·Scientific Reports·Lei DongYu Liu
Sep 17, 2020·Science Advances·Luis M A Bettencourt
Mar 18, 2021·Journal of the Royal Society, Interface·Carlos Molinero, Stefan Thurner
Mar 26, 2020·Environmental Science & Technology·Likwan Cheng

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