Brad DeLong has a change of heart

DeLong:

The Greenspanist retort to the Mussaites--a retort I would have said I believed 100% a year and a half ago, 90% a year ago, and 60% last March--is that creating unemployment and idle factories because you are scared of what might happen when irrational exuberance dies away and asset prices collapse is a crime; that modern central banks are powerful; that they can successfully manage whatever crisis is provoked when it happens; and that it is easier to sweep after the elephants have gone through than to try to stop them--especially when stopping them requires the destruction of millions of jobs.

I don't see how I can maintain my belief in Greenspanism today.