The question regarding the effects of changing transports costs on the size distribution of cities is an important topic of systems of cities research. The so-called New Economic Geography has already given some answers to this question. One central assumption in this kind of model is a very...

Economic activities are highly clustered. Why is geographic concentration becoming a predominant feature of modern economies? On the basis of the empirical models developed by the 'new' theories of international trade, our answer is that increasing returns are the driving force of economic...

Economic activities are highly clustered. Why is geographic concentration becoming a predominant feature of modern economies? On the basis of the empirical models developed by the 'new' theories of international trade, our answer is that increasing returns are the driving force of economic...

Using a generalized version of the Venables (International Economic Review, 37: 341-359) model, this article explores the relative locations of two vertically linked sectors with knowledge spillovers. Analytical investigation shows that the dynamic properties of the Venables model are...

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....

Economic activities are highly clustered. Why is geographic concentration becoming a predominant feature of modern economies? On the basis of the empirical models developed by the 'new' theories of international trade, our answer is that increasing returns are the driving force of economic...

In the last ten years the space issue, i.e. the study of the role played by space in economic phenomena, has attracted a lot of interest from many economic fields. The combination of increasing returns, market imperfections, and trade costs creates forces that, together with factor endowments,...

We propose an integrated framework to discuss the empirical literature on the local determinants of agglomeration effects. We start by presenting the theoretical mechanisms that ground individual and aggregate empirical specifications. We gradually introduce static effects, dynamic effects, and...