Deanna Horton locks up her bike in downtown Portland, Ore., Wednesday, Sept. 19, 2012. Researchers at Portland State University found that Portland is a magnet for the young and college educated, even though a disproportionate share of them are working in part-time jobs or positions that don’t require a college degree. (AP Photo/Don Ryan)

Associated Press
Deanna Horton locks up her bike in downtown Portland, Ore., Wednesday, Sept. 19, 2012.  Researchers at Portland State University found that Portland is a magnet for the young and college educated, even though a disproportionate share of them are working in part-time jobs or positions that don’t require a college degree. (AP Photo/Don Ryan)
Deanna Horton locks up her bike in downtown Portland, Ore., Wednesday, Sept. 19, 2012. Researchers at Portland State University found that Portland is a magnet for the young and college educated, even though a disproportionate share of them are working in part-time jobs or positions that don’t require a college degree. (AP Photo/Don Ryan)