So Alex Tabarrok thinks I treat everyone who disagrees with me as mendacious idiots, and Tyler Cowen says that I always demonize my opponents.

I plead innocent. I only treat people as mendacious idiots if they are mendacious idiots.

Seriously: I have some big disagreements with Ken Rogoff, but if you use the little search box up there on the upper right and enter “Rogoff” I think you’ll find that I have always treated him with respect. On the other hand, enter “Heritage” and you’ll find me pretty scornful — but with very good reason! And I always document what I’m saying.

Now, what about people like Cochrane? You need to bear two things in mind. First, he and his friends entered this whole debate by declaring that Keynesian economics of any stripe was total nonsense, “fairy tales” that nobody serious believes. Then they proceeded to make howling, basic errors. And I was supposed to respond politely? I’ve never gone ad hominem on them — but I’ve called nonsense and ignorance when I see them. So?

Cowen apparently wants me to make the best case for the opposing side in policy debates. Since when has that been the rule? I’m trying to move policy in what I believe to be the right direction — and I will make the best honest case I can for moving in that direction.

Look, economic policy matters. It matters for real people who suffer real consequences when we get it wrong. If I believe that the doctrine of expansionary austerity is all wrong, or that the Ryan plan for Medicare would have disastrous effects, or whatever, then my duty, as I see it, is to make my case as best I honestly can — not put on a decorous show of civilized discussion that pretends that there aren’t hired guns posing as analysts, and spares the feelings of people who are not in danger of losing their jobs or their health care.

This is not a game.