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The role of specialisation and diversity externalities in the agglomeration of innovative activities

Paci, Raffaele and Usai, Stefano (1999) The role of specialisation and diversity externalities in the agglomeration of innovative activities. Cagliari, CRENoS. p. 31 (Working Papers CRENoS, 1999, 15). Working Paper.

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Abstract

This paper contributes to the analysis of the process of spatial agglomeration of innovative activities by investigating directly its determinants. Our main purpose is to identify the extent to which the degree of industrial specialisation (Marshall externalities) or diversity (Jacobs externalities) in the region may affect the innovative output in a particular local industry. Moreover, we test if any relevant difference arises with respect to the role of diversity in metropolitan areas and in high-tech sectors. The analysis is carried out thanks to an original databank on innovation and production across Italian local labour systems. According to the estimation results there are clear signs of the two types of externalities working simultaneously: Marshall externalities (or localisation economies), associated to industrial specialisation within the sector and also within the science base cluster; and Jacobs externalities (or urbanisation economies), associated to the degree of diversity of both the local districts and the science base cluster. With respect to the industrial diversity at the local district level, however, it is worth noting that it plays a different role depending on the dimension of the local district (whether it is a metropolitan area or not) and on the type of industry (high Vs low tech sectors).

Item Type:Working Paper
ID Code:64
Status:Published
Uncontrolled Keywords:Innovation, industrial agglomeration, externalities, geography, Italy
Subjects:Area 13 - Scienze economiche e statistiche > SECS-P/01 Economia politica
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > CRENoS-Centro Ricerche Economiche Nord Sud, Università di Cagliari e Università di Sassari
001 Università di Sassari > 01 Dipartimenti > Economia, istituzioni e società
Publisher:CRENoS
Publisher Policy:Depositato per gentile concessione del CRENoS
Deposited On:18 Aug 2009 10:01

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