Here is my short essay on that topic, riffing on Christopher Hayes’s recent article. You’ll find other related essays and links here (David Warsh and Paul Krugman will be joining in at some point). Here is my bottom line:
There’s much talk in Hayes’ article about discrimination against heterodox economists, but he gives surprisingly little attention to which of their valid propositions have been neglected. I’d like to see a simple list and start the debate there.