More troubling, these jobs in accounting, financial analysis, commercial printing and a broad array of other mostly white-collar occupations are unlikely to come back, experts predict.
There isn't a single cause to the trend. Some of it is explained by changing technology, some of it is the result of automation. Sending well-paying jobs to low-cost centers abroad is another big part of the story. So is global competition from emerging economies such as China and India.
The result is the same in all cases, however. Jobs that paid well, required skills and produced vital communities are going away and aren't being replaced by anything comparable.RelatedLame-duck Congress faces budget, tax decisions that will affect most TennesseansExtended jobless benefits will end soon unless Congress actsJobs resources, tips and videos
"Unfortunately, the evidence is that you see a form of downward mobility of workers who are displaced from middle-skilled, stable career occupations," said David Autor, an economist at the Massachusetts Institute of Technology, in an interview.
Autor published a much-discussed paper in April, suggesting that the U.S. labor market has become polarized, with employment growth in the high-skill, high-wage end, and the low-skill, low-wage end. The vast middle, he concluded, is shrinking.
"The Great Recession has quantitatively but not qualitatively changed the direction of the U.S. labor market," Autor concluded, pointing to an accelerating trend that he said has been under way for more than a decade.Income keeps declining
Lois Williams-Norman is on the upper end of what could be called a middle-skill job, working her entire career in corporations as an internal financial and budget expert.
Like millions of Americans, she has had to swallow her pride and step down the income ladder.
"I've gone from a six-figure income to seriously looking at positions that are going to be paying probably half as much. So over the past 10 years, my income has continued to decline year after year," Williams-Norman said during an interview in the western New York city of Rochester, in between networking events where she searched for employment.(2 of 2)
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