Cluster Mapping Project...

For those looking at regional economies or industry clusters, the Cluster Mapping Project at the Harvard Business School's Institute for Strategy and Competitiveness is an interesting resource:

"The Cluster Mapping Project uses detailed county level data and statistical techniques to profile regional economies and their performance over time, with a special focus on clusters. Clusters are geographically concentrated groups of interconnected companies, universities, and related institutions that arise out of linkages or externalities across industries. Regions and clusters are analyzed at various geographic levels including states, economic areas, and metropolitan areas. A more detailed description of the project, including its methodology, is available. below. "

Free registration required to access one level of data. Access to more detailed data requires an annual subscription fee$.