I don't need or want red-flag clues. I'm an adult, capable of listening to all sides and deciding on the merits. All sides means all sides. Krugman is capable and knowledgeable, certainly worthy of an honest hearing.
Check out keyword "krugman" here on FR and get a good look at the history of things this guy has said
Krugman has as good a track record as any other first-line economist and pundit. Most on FR are not capable of judging for themselves but must run to National Review to see what Luskin said. In my view, as I've said repeatedly, Luskin is nothing but a tire-biter, a nit-picker.
Eventually experience will train you, like it trained me, to give Krugman no more creedence than one would to Maureen Dowd. Krugman has been saying the economy is getting worse for years, while all the time it has been getting better.