Cluster emergence: combining pre-existing conditions and triggering factors

This article argues that the emergence of regional clusters relies on both necessary pre-existing conditions for cluster appearance in general and triggering factors that cause clusters to emerge in particular places. This approach is used to analyse two ‘critical cases’; the emergence of the synthetic-knowledge boat building industry in the Arendal area in Norway from the mid-1950s and the analytical-knowledge cancer medicine industry in Oslo around the year 2000. Although the industries and the contexts are otherwise very different, the framework turns out to be useful in interpreting the emergence of the two clusters. However, the specific pre-existing conditions and the triggering factors differ between the two cases. The Arendal boat building industry emerged through the combination of traditional boat building skills and exogenous knowledge of the use of new plastic material, while the Oslo cancer medicine industry built on indigenously-developed scientific knowledge. The framework is useful in putting anecdotal evidence of cluster emergence due to the efforts of entrepreneurs into a wider analytical framework of the preconditions necessary for entrepreneurs to succeed.