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I can't speak for Ace, but from my perspective (neck deep in this crap for my profession), I'd say the following:
Without a doubt, this is one of the worst or THE worst recovery in our history, and the reasons for it seem abundantly clear. To simplify this as much as possible, I'd point to two macro reasons:
First, the depth, breadth and complexity of the meltdown. The unwinding of credit markets and subsequent pain caused by it was going to be massive, and it was. Worse, the symbiotic nature of our modern-day global economic system signaled the inevitability of the international collapse. So that has to play out as well before we see a strong, sustained period of growth.
Second, just as radiation treatments can often cause more damage than the cancer they're designed to cure, the steps taken in late 2008/2009 to end the worst of the crisis significantly slowed down the healing process by retarding the unwinding of credit markets. Quantitative easing will do that, we know that, but it was determined that it was/is necessary. There are people a lot smarter than me, with more letters after their name than me, who can't tell you if this has been a good idea or not.
Now, of course, this won't be a good enough explanation for the hardcore partisans, it doesn't point the finger enough at "the other guys", I know. It doesn't play into the incredibly simplistic and transparent games being played by the ideologues, sorry.
Just my humble little opinion.
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