Recovery in their time by Ryan Avent

Based on this Mr Crafts reckons that central-bank independence could be self-defeating at the zero lower bound. That's interesting, and quite a different argument from the more common recent case against central-bank independence: that at the zero lower bound (and especially when banking systems are in trouble) the central bank needs fiscal help to get the transmission mechanism operating. But is it right? 

When I look at the Fed, for instance, I see three possible ways in which the "foolproof way" has failed to win support. One is an intellectual failure: central bankers may have learned and even supported the foolproof strategy when applied on other economies or in other time periods, but when the solution is put to them as policymakers they are reluctant to abandon inflation targeting, presumably because they perceive the gains to low and stable inflation to be so substantial. In this case, the problem with the foolproof method is that it has not been tried. 

A second possibility is that the Fed has in fact done quite a lot to signal to markets that inflation expectations should be higher. But it has failed to raise inflation expectations much above 2% because of the credibility it has earned as an inflation fighter and the time inconsistency problem mentioned by Mr Crafts. In this case a reduction in political independence may improve central bank policy. 

But a third possibility is that the central bank recognises and would like to try the foolproof strategy but feels constrained by the government, presumably because there is a strong domestic political constituency against higher inflation. In an older population, for example, where the old are generally net creditors and more politically active than young debtors, resistence to higher inflation could be strong. In this case the problem is that the central bank isn't politically independent enough. 

I don't know which problem afflicts which economies. I would have said that Japan falls into the third category; perhaps it did until something—a destabilising catastrophe for example—disturbed that equilibrium. I do appreciate Mr Crafts' reminder that we know how to escape our current doldrums, or used to at any rate.

Which Textbook Is That, Exactly? by Krugman