Drinking the Chicago Kool-Aid

The truce between the freshwater and salt-water economists has been broken and there is a war of words spinning across the blogosphere. Krugman's latest take:

There seems to be an amazing amount of misunderstanding of the basics of fiscal policy, even among people who should know better. Leave on one side the remarkable parade of economists who think that the savings-investment identity proves that government action can’t increase spending; PGL points us to a higher-level fallacy: the widespread belief that Ricardian equivalence doesn’t just say that tax cuts have no effect — which it does — it also says that private consumption automatically offsets any rise in government spending, which is just wrong.

Justin Wolfers suggests that this is because economists just haven’t been thinking and writing about fiscal policy. Maybe. But in my own neck of the woods, that isn’t true. In the New Open Economy Macroeconomics, which dates back to classic work by Obstfeld and Rogoff in the early 90s, both fiscal and monetary policy are usually analyzed.

And by the way: these are extremely buttoned-down models, with lots of intertemporal maximization, careful attention to budget constraints, and at most some assumption of temporary price rigidity. Nobody who was at all familiar with this literature could make the logic mistakes that are coming fast and furious from the fresh-water economists.

What this reveals, I think, is just how insular part of the macroeconomics profession has become. They just don’t read anything that doesn’t come from their cult circle; they just weren’t aware of major bodies of work that didn’t happen to be in their preferred style.

This insularity is asymmetric. Ask a PhD student at Princeton what a real business cycle theorist would say about something, and he or she can do that; ask a student at one of the freshwater schools what a new Keynesian would say, and I doubt that he or she could answer. They’ve been taught that there is one true faith, and have been carefully protected from heresy.

It’s a sad story.