S. Daniotti,M. Hartog, & F. Neffke, The coherence of US cities, Proc. Natl. Acad. Sci

Objective:

• Use coherence to study the long-run evolution of the US urban system between 1850 and today

Case:

• US cities

Methodology:

• Coherence indicator
• Scaling law

Data Source

• US census
• BLS Occupational employment statistics
• PatentsView

Findings:

• The average coherence of cities in the US urban system remained constant in datasets that stretched over 170 years and across activity types

• A universal relation between coherence and city size

Coding Reference:

• Not Applicable