I'm posting this message on behalf of Eric Byron:
I have always wondered who decided, prior to 1930, which recordings would be
packaged together on records with two sides. Did the record companies have
formulas? Were the companies trying to promote side B by having it next to
side A?

Did the companies have an entire department, one person or both in charge of
such decisions?

Has anybody written anything on the subject?

Any help would be greatly appreciated.

Eric Byron