Quote from Martinghoul:
Right... So this is Bullard's point, I think. When you say "rates at 0% forever" that, by itself, doesn't actually do anything. It creates an incentive for various economic agents to act in a certain manner. What we have at the moment is the problem that, having seen Japan, economic agents are likely to interpret the signal differently, i.e. they might start expecting much lower nominal growth in everything, including wages. So the economic incentive that you're referring to is, effectively, drowned out by the "we're screwed for a long time" signal. Again, that's just how I understand it.