I think there might be some variations around the music business, maybe tv/film is a segment with one standard and other segements have slightly different standards?
This is from an article on Songwriters Guild of America (source:
http://www.songwritersguild.com/publishing_deal.html ):
"In the old days, most deals were 50/50 because there was a concept that the "writer's share" was 50% and the "publisher's share" was 50%. This, of course, was an invention of the publishers. Legally, these terms have no such inherent meaning but their calculation is defined in each individual agreement. Most modern publishing deals, however, are referred to as "co-publishing" deals and the monies are usually calculated at around 75/25 meaning the writer gets 100% of the 50% writer's share and 50% of the publisher's 50% share for a total of 75%."
As I read it, he's saying that keeping the writers share for the writer and the publishers share for the publisher is how it used to be, but that has changed as a "standard". He's not talking about tv/film publishers / libraries in particular, though, which is why I think Dave's answer might not apply in general, but maybe mostly for the deals you can expect with tv/film publishers / libraries?
Either way, Taxi is not a philantrophic organization, allthough I do believe they protect members not only by screening submissions, but also by being particular with the listings from libraries, supervisors and publishers. Taxi have nothing to do with the deals and the contracts, though, so I don't know if it's fair to expect any interventions or value propositions as part of their corporate social responsibility.
Edit. I found a similar article on co-publishing deals on Taxi's own FAQ pages here written by Jeffrey & Todd Brabec
http://www.taxi.com/music-business-faq/ ... ree-1.html
I don't think new writers will have much clout to get a co-publishing deal, though. I don't know, but I think you mostly find those type of deals with record labels, if you are an established artist in a solid bargaining position. I have not come across co-publishing deals myself in the tv/film libraries world, but it seems to be a little blurred how widespread they are, if you read the articles.