FILE- In this Thursday, April 23, 2009, file photo, Jerald Vance, 50, is silhouetted as he waits to talk to a job counselor at a Nevada Jobconnect Career Center in Las Vegas. An Associated Press investigation released in January 2013 found that millions of mid-skill, mid-pay jobs have disappeared over the past five years and have been replaced with technology. That experience has left a growing number of technologists and economists wondering if middle-class jobs will return when the global economy recovers, or are they lost forever because of the advance of technology. (AP Photo/Jae C. Hong, File)

Associated Press
FILE- In this Thursday, April 23, 2009, file photo, Jerald Vance, 50, is silhouetted as he waits to talk to a job counselor at a Nevada Jobconnect Career Center in Las Vegas. An Associated Press investigation released in January 2013 found that millions of mid-skill, mid-pay jobs have disappeared over the past five years and have been replaced with technology. That experience has left a growing number of technologists and economists wondering if middle-class jobs will return when the global economy recovers, or are they lost forever because of the advance of technology. (AP Photo/Jae C. Hong, File)
FILE- In this Thursday, April 23, 2009, file photo, Jerald Vance, 50, is silhouetted as he waits to talk to a job counselor at a Nevada Jobconnect Career Center in Las Vegas. An Associated Press investigation released in January 2013 found that millions of mid-skill, mid-pay jobs have disappeared over the past five years and have been replaced with technology. That experience has left a growing number of technologists and economists wondering if middle-class jobs will return when the global economy recovers, or are they lost forever because of the advance of technology. (AP Photo/Jae C. Hong, File)
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