In the last decades numerous studies on industrial districts have proved how concentrations of small firms located in the same area and specialized in the production of the same products contribute to the competitiveness and the economic development of this type of areas. In the recent years...

Cluster analysis has been widely used in an Input-Output framework, with the main objective of uncover the structure of production, in order to better identify which sectors are strongly connected with each other and choose the key sectors of a national or regional economy. There are many...