I think that all those independant labels such as Blue Note, Riverside, Prestige, etc were managed approximately the same way. It would be interesting to know what are actually the managment method of a record company to have an idea of all the others. Surprisingly, nobody ever asked about it to Lion Wolff, Weinstock, Keepnews, Grauer when they were still alive : for sure they all had anwers to those endless questions...