The presence of knowledge spillovers and shared human capital is at the heart of the Marhall-Arrow- Romer externalities hypothesis. Most of the earlier empirical contributions on knowledge externalities, however, considered data aggregated at a regional level so that conclusions are based on the...

In this paper we aim at identifying stylized facts in order to suggest adequate models of spatial co–agglomeration of industries. We describe a class of spatial statistical methods to be used in the empirical analysis of spatial clusters. Compared to previous contributions using point pattern...

The spatial concentration of firms has long been a central issue in economics both under the theoretical and the applied point of view due mainly to the important policy implications. A popular approach to its measurement, which does not suffer from the problem of the arbitrariness of the...

The study of the geographical distribution of firms and of the dynamic pattern of firm entry and firm exits is a particularly relevant issue in regional health economics especially in the view of policy intervention to geographically balance health service supply and demand. The current state of...

The use of the K-functions (Ripley, 1977) has become recently popular in the analysis of the spatial pattern of firms. It was first introduced in the economic literature by Arbia and Espa (1996) and then popularized by Marcon and Puech (2003), Quah and Simpson (2003), Duranton and Overman (2005)...

In economic policy the term ?industry cluster? is often used to explain geographical concentrations of economic and innovation activities. The prominence of the cluster idea that was in particular triggered by Porter (1990) and Enright (1996) is not too surprising since ?both firms keen to...

Today more than half of the 7 billion inhabitants of the planet live in urban areas, with this share expected to keep rising. Whereas in developed countries urbanisation has been a long and slow process, in developing countries this process is now characterised by a really fast pace and a high...