Maggioni, Mario A.2018-02-052018-02-052004https://hdl.handle.net/2445/119593When a major technological innovation spreads out in both high-tech and middle/low-tech industries, new clusters appear, develop and grow at the expenses of “older” historical industrial sites. The literature has, under various labels, recognized three main stages of cluster development: an initial stage sparked by an initial exogenous, shock; a second stage driven by Marshall’s (1920) agglomeration economies (labor market pooling, supply of intermediate goods and services and knowledge spillovers); a third stage in which the cluster either achieves a sectoral leadership or declines. The paper shows how different clusters ’evolution (often told as separated stories) are part of a wider picture in which technological and spatial interactions between emerging and declining clusters play a decisive role. A final section draws some policy suggestions for public authorities and regional planners dealing with the development of an innovative cluster.43 p.application/pdfengcc-by-nc-nd, (c) Maggioni, 2004http://creativecommons.org/licenses/by-nc-nd/3.0/es/Sistemes productius localsLocalització industrialRecerca industrialIndustrial clustersIndustrial locationIndustrial researchinfo:eu-repo/semantics/workingPaperinfo:eu-repo/semantics/openAccess