(This is a post on behalf of "Paul Lamb", who can't sign up for the site.)
My novel has 23 chapters. I have had ten of these chapters published as stand-alone stories in various literary magazines. Does this help or hurt my chances to find representation for the novel? Should I continue to submit individual chapters for publication? Or is there a certain maximum percentage of the manuscript that should appear in print before the entire novel becomes no longer viable for agent representation? What is an agent's perspective on this? Is there a standard or a conventional wisdom about it?