I'm not sure about field-wide RSS feeds, but SSRN does have author-specific RSS feeds like http://www.ssrn.com/rss/authors/1997/0701/998.rss http://www.ssrn.com

I'm not sure about field-wide RSS feeds, but SSRN does have author-specific RSS feeds like http://www.ssrn.com/rss/authors/1997/0701/998.rss http://www.ssrn.com/rss/authors/1997/0701/998.rss for Eugene Fama.