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Longtime industrial city Decatur, Ill., had the country’s greatest unemployment rate reduction. But people leaving the workforce – moving away, retiring, no longer looking for jobs -- may be the cause, rather than economic expansion. Local residents playing the treasure hunting game geocaching in downtown Decatur. From left are Nicole Smalley, Evan Kershner, Cody Henson, Chris Ridgeway (kneeling), Nikki and Ryan Clemens (stripes), Amber Ridgeway (holding phone) and Alan Kershner (background, partially visible).<br />
CREDIT: Kristen Schmid for the Wall Street Journal<br />