Urban scaling

Urban scaling refers to the empirical regularities describing how properties of cities change with population size. Following the framework of allometric scaling research, urban studies have shown that cities exhibit systematic scaling laws: infrastructure quantities (road length, electrical cable length) scale sublinearly with population, while socioeconomic outputs (wages, patents, crime rates, disease incidence) scale superlinearly.

The consistency of these exponents across cultures, nations, and time periods suggests that urban scaling is not driven by local policy or cultural specifics but by fundamental network constraints on how human interactions and resource distribution scale with population density. The superlinear scaling of innovation and crime implies that cities function as amplifiers of human interaction, with consequences that are both economically productive and socially costly.