What are agglomeration economies?

The cost and productivity advantages firms and workers gain from locating near one another, a key reason cities exist.

What is the bid-rent curve?

The relationship showing how much different users will pay for land at varying distances from a centre, explaining urban land-use patterns.

Urban, Rural, Regional, Real Estate, and Transportation Economics

Urban, rural, and regional economics study the spatial organization of economic activity — where firms and households locate, how cities and regions grow, and the economics of land, housing, and transportation.

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Scope

This field (JEL category R) covers location theory, land and housing markets, urban growth and agglomeration, regional development, and transportation economics.

Sub-topics

Core questions

Why do economic activities concentrate in particular places?
What determines land and housing prices?
Why do cities exist and grow?
What drives regional disparities?
How do transport costs shape spatial patterns?

Key concepts

Location theory
Land rent and the bid-rent curve
Agglomeration economies
Core-periphery patterns
Housing markets
Regional convergence
Transport costs

Key theories

Location and land rent: Von Thünen's model of agricultural land use around a market, extended by Alonso to urban land markets, explains how location and transport costs determine land rent and use.
New economic geography: Krugman showed how increasing returns and transport costs generate the agglomeration of activity into cities and core-periphery patterns.

History

Spatial economics began with von Thünen (1826) and the German location theorists (Weber, Christaller, Lösch). Alonso's urban land-use model (1964) and regional science (Isard) formalized it mid-century, and Krugman's new economic geography (1991) brought agglomeration into mainstream economics, winning renewed attention to the spatial economy.

Debates

What drives agglomeration?: Whether firms cluster mainly for input sharing, labour pooling, or knowledge spillovers remains debated.
Should regional policy fight or follow agglomeration?: Policy debate weighs supporting lagging regions against the efficiency of concentration.

Key figures

Johann Heinrich von Thünen
William Alonso
Paul Krugman

Seminal works

vonthunen-1826
alonso-1964
krugman-1991

Frequently asked questions

What are agglomeration economies?: The cost and productivity advantages firms and workers gain from locating near one another, a key reason cities exist.
What is the bid-rent curve?: The relationship showing how much different users will pay for land at varying distances from a centre, explaining urban land-use patterns.