A family, as defined by the BLS, is a group of two or more people who live together and who are related by birth, adoption or marriage. In 2013, there were 80,445,000 families in the United States and in 16,127,000—or 20 percent--no one had a job.

The BLS designates a person as “employed” if “during the survey reference week” they “(a) did any work at all as paid employees; (b) worked in their own business, profession, or on their own farm; (c) or worked 15 hours or more as unpaid workers in an enterprise operated by a member of the family.”