U-6 Unemployment

U-6 unemployment is the broadest official measure of labor market slack. It includes everyone counted in the U-3 unemployment rate, plus discouraged workers who have given up looking, marginally attached workers who want a job but are not actively searching, and involuntary part-time workers who want full-time employment.

The components

U-6 stacks four groups:

1. U-3 unemployed — no job, actively searched in past 4 weeks, available.
2. Discouraged workers — want work but have given up searching. Typically 0.3–0.5% of the labor force, higher in recessions.
3. Marginally attached workers — want work, looked in past 12 months but not in past 4 weeks. Not searching now due to school, health, or discouragement. Typically 0.5–1.0%.
4. Involuntary part-time workers — working part-time, want full-time work, cannot find it. Often the largest subgroup.

Why U-6 matters

U-6 is a more complete picture of labor market slack than U-3:

• It captures discouragement. In severe recessions, many workers give up looking. U-3 ignores them; U-6 does not.
• It captures underemployment. A worker with a part-time job forced to accept lower hours is underemployed but counted as fully employed in U-3.
• It better predicts inflation. Some research finds U-6 is a better leading indicator of wage and price pressure than U-3.

U-6 in recessions

U-6 widens dramatically in severe downturns:

The Great Recession was far worse than U-3 alone suggests. Many workers were underemployed or discouraged; U-6 captures this. By 2023, U-6 remained elevated despite low U-3, suggesting ongoing underemployment.

The involuntary part-time component

A large part of the U-6/U-3 gap is involuntary part-time workers. These are people working part-time for economic reasons — they could not find full-time work. The number varies with the business cycle:

• Tight labor markets: Few involuntary part-time workers; U-6/U-3 gap narrows.
• Slack labor markets: Many involuntary part-time workers; U-6/U-3 gap widens.

During COVID lockdowns, some workers were forced to part-time status; as demand recovered, they returned to full-time. But the persistent gap since 2023 suggests some workers remain trapped in part-time status.

Discouraged workers

These are people who have looked for work in the past 12 months but not in the past 4 weeks. They are not counted in U-3 but are counted in U-6. The number fluctuates:

• Booms: Near zero; everyone who wants a job can find one.
• Slack labor markets: 0.5–1.5% of the labor force.
• Severe recessions: Can exceed 2% of the labor force.

The challenge: how do you count someone who does not show up in official job search? The CPS asks directly in its supplemental questions, so U-6 numbers are estimated, not directly observed. Accuracy depends on survey response quality.

U-6 and inflation

Some economists argue U-6 is a better predictor of wage inflation and price inflation than U-3. The logic: involuntary part-time workers are underutilized labor slack. As this slack shrinks, firms must raise wages to attract workers, driving inflation.

The Federal Reserve has historically focused on U-3, but recent work suggests paying more attention to U-6 — particularly the involuntary part-time component — would have better predicted inflation in the 2020s.

Criticism of U-6

Despite being broader than U-3, U-6 still has limitations:

• It ignores quality. A worker underemployed with bad pay or hours is the same as one barely underemployed.
• Involuntary part-time is measured from a one-week snapshot. A worker who wants full-time work but happened to work part-time in the survey week is counted. Someone who normally works full-time but worked part-time that week due to vacation might also be counted.
• It does not capture wage suppression. Workers might be employed at lower wages than they deserve, but U-6 does not capture this.

See also