Topic 2.3 Notes – Unemployment

1. The Labor Force, Unemployment Rate, and Participation Rate

Unemployment is one of the three big macro indicators, along with GDP and inflation. Everything starts with knowing who is counted.

Who Is in the Labor Force

The labor force includes people age 16+ who are:

• Employed
• Unemployed but actively seeking work

It does not include:

• Retired people
• Full-time students not looking for work
• Stay-at-home parents not seeking work
• Military and institutionalized individuals
• Discouraged workers (people who gave up looking because they think no jobs are available)

Two relationships you should know cold:

• Labor Force = Employed + Unemployed
• Adult Population = Labor Force + Not in Labor Force

The Bureau of Labor Statistics (BLS) measures this using surveys like the Current Population Survey.

The Unemployment Rate

The unemployment rate measures the percent of the labor force that is jobless.

$$\text{Unemployment Rate} = \left( \frac{\text{Unemployed}}{\text{Labor Force}} \right) \times 100$$

Notice the denominator is the labor force, not the total population.

Quick example:
If 9 million people are unemployed and the labor force is 180 million:

$$\frac{9}{180} \times 100 = 5\%$$

That’s a 5% unemployment rate.

How it changes

• If unemployed ↓ and labor force stays constant → rate falls.
• If discouraged workers stop looking → labor force shrinks → unemployment rate may fall even if the economy didn’t improve.
• If more people start job hunting in a weak economy → labor force rises → unemployment rate can increase.

This last one shows up on AP questions a lot. More job seekers can temporarily raise the rate.

Labor Force Participation Rate

The labor force participation rate (LFPR) measures how active the adult population is in the labor market.

$$\text{LFPR} = \left( \frac{\text{Labor Force}}{\text{Adult Population}} \right) \times 100$$

If the labor force is 180 million and the adult population is 240 million:

$$\frac{180}{240} \times 100 = 75\%$$

What affects LFPR?

• Demographics (aging population lowers it)
• Cultural trends (more women entering workforce increased it in the late 20th century)
• Economic conditions (strong economies pull people into job searching)

After the 2008 Great Recession and during COVID-19, LFPR fell as many workers left the labor force.

2. The Three Types of Unemployment

Economists divide unemployment into three categories.

Frictional Unemployment

• Short-term
• Workers between jobs or entering workforce
• Normal in a healthy, dynamic economy

Example: Someone quits to find a better job.
Improved job-search tech like LinkedIn can reduce frictional unemployment.

Structural Unemployment

• Mismatch between worker skills and available jobs
• Caused by:
  • Technology (automation replacing factory jobs)
  • Globalization
  • Regional industry decline

Classic textbook example: typewriter repair workers after computers replaced typewriters.

This type often requires retraining or relocation.

Cyclical Unemployment

• Caused by recessions and falling aggregate demand
• Rises during downturns, falls in expansions

Examples:

• Great Depression
• 2008-2009 Great Recession
• COVID-19 recession (2020)

Governments respond with expansionary fiscal and monetary policy to reduce it.

3. The Natural Rate of Unemployment and Full Employment

Natural Rate of Unemployment

$$\text{Natural Rate} = \text{Frictional} + \text{Structural}$$

Usually around 4-6% in the U.S., though it changes over time.

It exists even when the economy is at full-employment output.

Full Employment

Full employment does not mean 0%.

It means no cyclical unemployment. The economy is producing at potential GDP on the LRAS curve.

The actual unemployment rate is the measured rate from Section 1: frictional + structural + cyclical. Compare it to the natural rate.

If actual unemployment is:

• Above natural rate → recessionary gap
• Below natural rate → inflationary pressure (overheating)

Cyclical unemployment is the difference between actual and natural.

Why the Natural Rate Changes

It shifts due to:

• Demographics
• Education and training levels
• Labor market policies
• Technological change

For example, automation can raise structural unemployment temporarily. Better job matching can lower frictional unemployment.

4. Limitations of the Unemployment Rate

The unemployment rate often understates true joblessness.

It excludes:

• Discouraged workers
• Marginally attached workers
• Underemployed workers (part-time but want full-time)

During long recessions, people stop looking. The unemployment rate can fall even while the economy remains weak. That’s why economists also watch broader measures like U-6.

If you see a question where discouraged workers increase, think carefully about what happens to both the unemployment rate and LFPR.