Alternative Measures of Labor Underutilization
Measure:	Definition:
U1	Persons unemployed 15 weeks or longer, as a percent of the civilian labor force.
U2	Job losers and persons who completed temporary jobs, as a percent of the civilian labor force.
U3	Total unemployed, as a percent of the civilian labor force (the official unemployment rate).
U4	Total unemployed plus discouraged workers, as a percent of the civilian labor force plus discouraged workers.
U5	Total unemployed, plus discouraged workers, plus all other marginally attached workers as a percent of the civilian labor force plus all marginally attached workers.
U6	Total unemployed, plus all marginally attached workers, plus total employed part time for economic reasons, as a percentage of the civilian labor force plus all marginally attached workers.
Note:	Marginally attached workers are persons who currently are neither working nor looking for work but indicate that they want and are available for a job and have looked for work sometime in the recent past.
	Discouraged workers, a subset of marginally attached workers, have given a job-market-related reason for not currently looking for a job.
	Persons employed part-time for economic reasons are those who want and are available for full-time work but have had to settle for a part-time schedule.