The American Mathematical Society (AMS) has quite a few journals titled "(something) of the AMS".
The research journals include:
- Journal of the AMS
- Proceedings of the AMS
- Transactions of the AMS
- Memoirs of the AMS
How do these journals differ in terms of scope?
Some information about the roles of these journals can be found on the AMS journals website. However the only distinctions given are that JAMS is for "research articles of the highest quality," while PAMS, TAMS, and MAMS are for short, medium, and long articles respectively.
Are there further differentiations between these journals? If a mathematician wants to submit a paper to an AMS journal is the decision process for which one really as simple as "If my paper isn't good enough for JAMS I'll check its length and ship it off to the appropriate one of the other 3?"