08709. THE HUB-AND-SPOKE CONCEPT IN AIRLINE DESIGN. Describes the evolution and structure of hub and spoke airline routing system following 1978 airline deregulation. Discusses marketing and economic advantages to airlines in using the system as well as negative revenue impact on airports resulting from the system. A cost analysis study revealed that as hubs become more congested and are subject to increased airline competition, they lose their cost effectiveness. 20 pages, 38 footnotes, 14 bibliographic sources.