I was talking to some economist friends about the future of the music business if musicians couldn't earn any money outside of live performances and swag sales, and I proposed that we could use the music industry prior to the widespread introduction of recorded music sales as a potential avenue of exploration.
Are there any good sources on the number of professional musicians in the US and Europe in the 19th century and earlier?
We recognize there are a number of challenges with this potential analysis (substitution between recorded and live music means that musicians today might face lower demand for performances, the concept of a professional musician as we understand it might not have emerged until fairly recently), but we'd love to have an idea about the validity of the no-recorded-music-revenue-means-no-musicians argument that we hear so much.