The article explores innovation clusters in European regions using data on regional patenting. It shows that there is a pattern of innovation activities being clustered together in certain areas. The researchers looked at different manufacturing sectors to see if there were differences in how innovation was distributed. They also studied factors like specialization, diversity, and local market effects to understand what influences innovation in a region. The findings suggest that the concentration of innovative activities in specific regions is influenced by various factors, including the type of industry and local market conditions.