We develop a diagrammatic framework that can be used to study the economic linkages between regions or cities. Hitherto, such linkages have not been the primary focus of either the theoretical or empirical literatures. We use the framework to analyse the impact of shocks that occur in one region...

We consider the literatures on urban systems and New Economic Geography to examine questions concerning agglomeration and how areas respond to shocks to the economic environment. We first propose a diagrammatic framework to compare the two approaches. We then use this framework to study a number...

We analyze demand for prepaid cellular voice and short message service (SMS) in South Africa by means of a demand-and-supply structural model based on a multinomial specification fitted to a cross-sectional data set on Vodacom customers collected in 2005. We find that consumers are very...

This paper presents a dynamic, two-region general equilibrium model in which inter-regional production and trade patterns are endogenously determined. Localized growth stems from geographical concentration of an industrial sector exhibiting permanent productivity increases. Geographical...

This paper investigates the possibility of endogenous fluctuations in the international distribution of economic activities in the presence of increasing returns, monopolistic competition, trade and convex adjustment costs without allowing for any local productive externalities. Using a...

This Paper develops a model in which the interaction between product market imperfections, transportation costs, unions and workers immobility across regions creates a tendency for agglomeration of firms when transportation costs are low. The model fits quite well the European experience. It is...

While transport costs have fallen, the empirical evidence also points at rising total trade costs. In a model of industry location with endogenous transaction costs, we show how and under which conditions a decline in transport costs can lead to an increase in the total cost of trade.

We consider a model with a continuum of industries in which agglomeration forces cause each industry to concentrate in a single country. We study the division of industries between countries and show that this division is not unique, so that even with identical countries and symmetric industries...

Regions can benefit by offering infrastructure services that are differentiated by quality, thus segmenting the market for industrial location. Regions that compete on infrastructure quality have an incentive to increase the degree of differentiation between them. This places an upper bound on...

This Paper takes a broader look at how vertical linkages can trigger the spatial agglomeration of economic activity in a ‘new economic geography’ (NEG) set-up. First, it formally establishes the key positive features of a wide class of vertical-linkage models without resorting to numerical...