PRESENTATION Leeds International Jazz Conference “Brilliant Corners” Leeds College of Music March 2005 Diffusion Patterns of Jazz in the U.S.A. The diffusion of jazz is a subject that has attracted a considerable amount of interest from both academics and amateur historian. Jon Glasgow (1994) one of the contributors to G.O. Carney’s seminal work on music geography highlighted the value of a cross discipline approach to research by applying techniques developed in one area (Geography) to another (Music) and so identifying new answers to established questions. Glasgow developed a dataset of artists’ dates and places of birth and death; to this he introduces census data to explore the likely pattern(s) of diffusion. His method of analysis is based on using the new results in conjunction with available data to determine the likely diffusion pattern. This research is influenced by Glasgow’s concept of diffusion, in that three general areas of jazz entertainment are examined (live venues, recorded and radio transmission) to this other data is brought into the discussion to assess their likely effect on the subject. The first piece is an examination of live venues, like Glasgow a number of datasets have been developed and analysis has been undertaken to test the relationship between different variables for their probable influence on determining the pattern of diffusion. The results are mapped using new spacio-temporal geographical mapping tools.