Unemployment
Measuring Unemployment
The unemployment rate (U3) is the official headline measure: the percentage of the labor force that is actively seeking work but unable to find a job.
The labor force includes employed and unemployed persons actively seeking work. Two broader measures capture underutilization:
- U6: includes discouraged workers (those who have stopped searching) and part-time workers who prefer full-time work — typically 2–3× higher than U3
- Labor force participation rate: the percentage of the working-age population that is in the labor force
- Employment-population ratio: the percentage of the working-age population that is employed
Falling participation can mask improvements in the unemployment rate when workers exit the labor force entirely.
Natural Rate of Unemployment
The natural rate of unemployment (also called NAIRU — Non-Accelerating Inflation Rate of Unemployment) is the unemployment rate at which inflation is stable. It is not zero; even a healthy economy has frictional and structural unemployment.
Cyclical unemployment arises from short-run fluctuations in aggregate demand. When actual unemployment is below the natural rate, inflation tends to rise; when above, inflation tends to fall.
Types of Unemployment
- Frictional unemployment: short-term unemployment from workers searching for jobs that match their skills. A natural byproduct of a dynamic economy.
- Structural unemployment: occurs when the number of jobs available in some labor markets is insufficient for everyone who wants one. Three primary causes:
- Minimum-wage laws: prevent wages from adjusting to equilibrium for low-skilled workers
- Unions and collective bargaining: push wages above equilibrium through market power
- Efficiency wages: firms voluntarily pay above-market wages to increase productivity
Okun’s Law
Okun’s Law quantifies the empirical relationship between the output gap and cyclical unemployment:
A rough rule of thumb: a 1 percentage point increase in the unemployment rate corresponds to roughly a 2 percent decline in real GDP relative to potential.
Theories of Unemployment
Efficiency Wage Models
Firms may choose to pay above the market-clearing wage to:
- Shirking model: higher wages raise the cost of job loss, discouraging shirking when monitoring is imperfect
- Turnover model: above-market wages reduce costly employee turnover
- Selection model: higher wages attract a more productive applicant pool
- Morale model: higher wages boost effort and morale
Insider-Outsider Model
Insiders (employed workers with bargaining power) push for higher wages at the expense of outsiders (the unemployed). Insiders face lower job-search costs and have more influence on wage negotiations, creating a wage floor above the market-clearing level. This contributes to hysteresis: cyclical unemployment can become structural if outsiders lose skills, networks, or motivation during prolonged unemployment, permanently raising the natural rate.
Search Theory and Unemployment Insurance
The Mortensen-Pissarides search-and-matching model frames unemployment as an equilibrium outcome of the search process:
- Workers and firms must search for each other — matching is costly and time-consuming (frictional)
- Unemployment insurance (UI) lowers the opportunity cost of searching, increasing reservation wages and prolonging unemployment duration
- More generous UI raises the steady-state unemployment rate but may improve job fit quality
Beveridge Curve
The Beveridge curve plots the vacancy rate (job openings as a share of labor force) against the unemployment rate. It is typically downward-sloping: more vacancies correspond with less unemployment in a boom. An outward shift of the curve indicates worsening labor-market matching efficiency — more vacancies coexist with the same unemployment rate, a sign of structural mismatch.