Table 3-12
Alternative measures of labor underutilization
 
Measure   Definition
 
U1 Percentage of the labor force unemployed for 15 weeks or longer
U2 Percentage of the labor force who lost jobs or completed temporary work
U3 Official unemployment rate: percentage of the labor force without jobs who have actively looked for work within the past 4 weeks
U4 U3 + percentage of the labor force who are discouraged workers (those who have stopped looking for work)
U5 U4 + percentage of the labor force who are marginally attached workers (those who would like to work but have not looked for work recently)
U6 U5 + percentage of the labor force who are part-time workers but want to work full time
 
SOURCE: Bureau of Labor Statistics, http://www.bls.gov/lau/stalt.htm.

Science and Engineering Indicators 2014