Detection of key sectors in any economy, whether national and regional level, is a key issue to which policymakers have to face when they need to take decisions to promote economic growth and regional development. Their identification, therefore, becomes a key objective, both to support the growth of macroeconomic variables such as GDP (gross domestic product) or GVA (gross value added), and increasing the number of jobs, or if a regional viewpoint is adopted, to be able to envision the impact of public spending at the regional level.