Roxane Gay writes an appreciation of story & narrative.
Christopher Higgs writes a rebuttal.
(I'm in Roxane's camp here.)
She also writes a bit about the economics, wrt a fascinating exchange between Steve Almond and an editor/agent who asks him to contribute to an anthology but won't pay him.
Speaking of which, here's an agent's blog post from 2008 containing a breakdown of how a common advance is paid out.