Cluster – A cluster is a regional concentration of related industries that arise out of the various types of linkages or externalities that span across industries in a particular location.
Establishment – An establishment is a single physical location at which business is conducted or services or industrial operations are performed. It is not necessarily identical with a company or enterprise, which may consist of one or more establishments. When two or more activities are carried on at a single location under a single ownership, all activities generally are grouped together as a single establishment.
Location Quotient – A location quotient greater than 1 indicates a higher than average cluster concentration in a location.
NAICS – The North American Industry Classification System is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy.
High Employment Share – States with high employment share rank among the top 10 percent of states with employment information by number of employees in an industry.
High Employment Specialization – States with high employment specialization have a location quotient ranking among the top 25 percent of states with employment information for an industry.