Job seekers wait in line to have their resumes reviewed at a job fair on November 9, 2011 in San Francisco, California. - 

Unemployment dropping to 7.5 percent has got to be the economic story of the month. Still, you may be saying, if only we could get that down to zero. But the dismal scientists beg to differ -- they say zero unemployment would actually be a problem. So what then is the goal?


Marketplace's economics correspondent Chris Farrell joins Morning Report host David Bracaccio to explain.



Follow Chris Farrell at @cfarrellecon