Abstract
Location theorists have emphasized the importance of agglomeration economies in explaining the concentration of industrial activity. They have divided these economies into portions that relate to average industry size, firm size, and market size. This study examines these three factors, in the context of value created, and concludes that each is statistically different for high tech industries in comparison to non-high tech industries. This finding adds an important dimension to state industrial development strategies, particularly those focused on high tech.