The Harvard Business School in combination with national Authorities and Statistics offers a very interesting side called Cluster Mapping (www.clustermapping.us). This side gives an overview to get a better impression where the top regions are. For example the 5st biggest industry by employees is « Financial Services » mainly positioned New York, California, Texas and Florida.
Transport and Logistics is mainly in Texas, California and Illinois. If we take a look at Industrie Production there is a after California and Texas Ohio an important location. The « Automotive Cluster » is mainly located in Michigan, Ohio and Indiana.