Modeling a micro-structure of agglomeration economies, this article derives a second-best benefit evaluation formula for urban transportation improvements. Without explicitly modeling the sources of agglomeration economies, Venables (JTEP 2007) investigated the same problem. This article...

We study decentralized and optimal urbanization in a simple multi-sector model of a rural-urban economy focusing on productivity differences and internal trade frictions. We show that even in the absence of the typical externalities studied in the literature, such as agglomeration, congestion or...

The division of labor between and within countries is driven by two fundamental forces, comparative advantage and increasing returns. We set up a simple Ricardian model with a Marshallian input sharing mechanism to study their interplay. The key insight that emerges is that the interaction...

This paper develops a model for analysing problems related to centralisation and decentralisation. The model is of the new economic geography type, in which there are agglomeration gains in cities but not in rural areas. These gains are counteracted by residential preferences. We show that, even...

Substantial attention has been given to the stylized fact that workforce education level tends to increase with city size. This paper demonstrates that the positive relation between city size and skill intensity is a spurious result due to the omission of housing cost, which increases with city...

Larger cities typically give rise to two opposite effects: tougher competition among firms and higher production costs. Using an urban model with substitutability of production factors and pro-competitive effects, I study the response of the market outcome to city size, land-use regulations, and...

We study the role of: (i) initial differences in shares of immobile workers between countries which stand for the agglomeration forces, and (ii) positive trade costs in the traditional sector which are related to the dispersion forces, in shaping the spatial pattern of the developed and...

The notion of 'polycentric city system' is currently receiving growing attention as a basic element of the 'European Spatial Policy'. From this perspective, both agglomeration and economic integration have to be reinterpreted on a wider geographical scale. This is of interest of the s.c....

This paper reconsiders the evolution of the growth of American cities since 1790 in light of new theories of urban growth. Our null hypothesis for long-term growth is random growth. We obtain evidence supporting random growth against the alternative of mean reversion (convergence) in city sizes...

Larger cities typically give rise to two effects working in opposite directions: tougher competition among firms and higher production costs. Using an urban model with substitutability of production factors and pro-competitive effects, we study how market outcome responds to city population...