Americans have gotten so productive, they may have worked themselves out of 4.4 million jobs.
It's a paradox playing out across the country: Economic output has returned to prerecession levels, but job creation has fallen short.
That means businesses are producing more goods and services with fewer workers. While that's great if you're running a company, it's not so great if you're one of the 12.8 million Americans looking for a job.
"It's a difficult story, but it's one of economic change," said Steve Landefeld, director of the Bureau of Economic Analysis.
The United States has recovered only about half of the 8.6 million jobs lost in the Great Recession. The reasons for the lag are diverse. Technology is helping workers produce more with greater speed -- or replacing them altogether. The tough economy has forced companies to get leaner and smarter. Global uncertainty has curtailed risk-taking investment.
The economy is reconfiguring itself in ways no one fully grasps, but economists say worker efficiency is producing part of the job market undertow.
"To me that's the ultimate research question in this right now," said Louis Johnston, who teaches economics at the College of St. Benedict and St. John's University in St. Joseph, Minn. "It's going to take a while for us to figure out what this all means."
In Minnesota, the trend is most pronounced in manufacturing. Output by the state's manufacturers rose 13 percent from 2007 to 2011, while the number of manufacturing jobs fell 12 percent.