Nearly 28 million employees—almost one in five—work part time. Part-time employees are especially likely to be female and earn low wages. Millions of those in part-time jobs work part time not because they want to, but because they cannot get full-time work. Others have to work part time to accommodate school or family obligations. Part-time employees frequently make less per hour for the same work, lack access to important workplace benefits, are denied promotion opportunities, and are subject to abusive scheduling practices.