I have been looking for data on record company market shares in the USA in
the 1950s, but I am still puzzled. There is RIAA data on total sales, and a
lot of (mostly anecdotal) detail on specific companies. Sanjek's books on
the music business are helpful, but do not follow the development
systematically. If I had access to all issues of Billboard from this
period, that might be the solution, but I do not have them
It seems likely that the three biggest companies in the USA during this
decade were CBS, RCA Victor and Decca. There were hundreds of other
companies, of various sizes. But which were the ten, or twenty, biggest
ones? I am not speaking of shares of hits in the charts (this has been
studied), but market shares - real or at least estimated?
All suggestions would be useful.