Industrial clusters, firm location and productivity – Some empirical evidence for Danish firms

Abstract

According to the economic literature, industrial clusters are groups of firms on the same location composing a production system with spillovers that can be vertical and/or horizontal. This paper focuses on horizontal clusters by exploring the spatial distribution of industrial clusters in Denmark. The key issue in the theoretical part of the paper is whether firms located in industrial clusters are more productive than their counterparts located separately outside industrial agglomerations. Firms located in clusters are potentially more productive than other firms because of the agglomeration advantages of e.g. networks, knowledge spillovers, human capital mobility etc. In the empirical part of the paper, industrial clusters are identified using municipalities as the spatial dimension. In the first part of the analysis, clusters are identified at the NACE-2 digit industrial level. Next, using firm-level data for the 1990s the relative ‘cluster-firm’ productivity is estimated. The study finds evidence of a significantly higher productivity in clusters. However, the magnitude of the cluster advantages varies a lot across industries and is highest in textile.Industrial clusters; productivity