Optimism?

I can't remember the last time Paul Krugman was optimistic about the economy (and his pessimism was, obviously, entirely warranted). So I was caught off-guard by this little ray of optimism in his column this morning:

So will our slump go on forever? No. In fact, the seeds of eventual recovery are already being planted.

I actually checked the byline again to make sure I was reading the right column.