This is a general purpose business database, which includes journals such as:
--Journal of Cultural Economics
--Arts and the Market
--International Journal of Arts Management
--Billboard
--Music Business International
as well as other publications focused on the arts and nonprofits.
Another general business database, which includes such journals as:
--Music Trades
--Music Week
--Cultural Trends
--Creative Industries Journal
As well, consider the Thesaurus for subjects such as nonprofit organizations, arts management, capitalism and the arts, government aid to the arts, museums, art and culture, and more.
Articles covering music, dance, and theater. This is a good resource for industry news and commentary. You may find relevant scholarly research as well.