Urban scaling in Europe

Area of Science:

• Urban studies
• Complex systems
• Economic geography

Background:

• A growing body of research suggests cities exhibit predictable properties due to agglomeration and scaling effects.
• These theories, originating from economics, geography, and complex systems, propose quantitative relationships in urban development.

Purpose of the Study:

• To investigate the applicability of urban scaling theories to European cities using harmonized functional urban area definitions.
• To develop a statistical method for overcoming data limitations in national urban systems and enabling cross-national analysis.

Main Methods:

• Harmonized definitions of functional urban areas were applied across European cities.
• A statistical procedure was developed to pool data from different national urban systems.
• Urban scaling relations were analyzed and compared against Zipf's law for city size distribution.

Main Results:

• While large Western European cities showed some agreement with theoretical expectations, national data limitations hindered strong conclusions.
• Pooling data from multiple European countries revealed clear urban scaling relations.
• Urban scaling proved to be a more accurate descriptor of European city size distribution than Zipf's law.

Conclusions:

• Urban scaling is a significant property of European cities, offering a framework for understanding their development.
• Future pan-European megacities may exhibit predictable characteristics with implications for economic productivity and regional inequality.
• The developed statistical approach enhances the analysis of urban scaling across diverse urban systems.