Labour networks, where industries are connected based on worker transitions, have been previously deployed to study the evolution of industrial structure ('related diversification') across cities and regions. Beyond estimating skill-overlap between industry pairs, such networks characterise the structure of inter-industry labour mobility and knowledge diffusion in an economy. Here we investigate the structure of the network of inter-industry worker flows in the Irish economy, seeking to identify groups of industries exhibiting high internal mobility and skill-overlap. We argue that these industry clusters represent skill basins in which skilled labour circulate and diffuse knowledge, and delineate the size of the skilled labour force available to an industry.
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