Does the American Mathematical Monthly allow ArXiv posting? This is a follow-up to the question Posting to ArXiv a longer version of a submitted journal paper.  The general consensus on that thread was that it is probably okay to do what I proposed, but that I should check with the editor first to make sure the journal does not have any kind of policy against ArXiv posting.

I've sent an inquiry to the editor in question, but haven't heard back (of course, it's summer and people's schedules are wonky, so I don't necessarily think the silence means anything).  I thought I would ask here:


  Does the American Mathematical Monthly have a policy prohibiting posting to ArXiv a longer version (or a preprint version) of a submitted manuscript?
Yes, they do allow arxiv postings at any stage.  However, starting in 2015 the Monthly has moved to a double-blind reviewing system (which, for general readers of this site, is all but unheard of in the field of mathematics).  Posting on the arxiv before or during submission would of course cause a serious risk of ruining the anonymity of the author.

I happen to know through direct experience that the Monthly views such ruination as being the author's prerogative. 

It should be emphasized that this is a recent development, and whether it will be continued in the future is up to the board of directors of the MAA (and not the editorial board of the Monthly, a fact which I found surprising).

Added: Some remarks about the laissez faire philosophy of the Monthly's double-blind policy can be found here.  The difficulty of preserving authorial anonymity in an arxiv culture is mentioned.