The Great Recession changed the American workplace. More and more jobs that used to be full time are now part time, with lower pay and limited or no benefits.

The number of "involuntary" part-time workers—people who want a full-time job but can't find one or have had their hours cut back by their current employer—has nearly doubled since 2007. There were 8.1 million involuntary part-time workers in October, versus 4.3 million in October 2007, according to the latest figures from the Bureau of Labor Statistics.