Source: Principles of Macroeconomics, University of Florida
Tags: labor market, unemployment rate, labor force participation rate, employment-population ratio, discouraged workers, underemployment, BLS, macroeconomics, ECO2013
Difficulty: Introductory | Prerequisites: Basic percentage/ratio calculations; familiarity with what the Bureau of Labor Statistics (BLS) does.
Big picture: This topic sits right at the start of the macroeconomics labour market unit. Before you can talk about what causes unemployment or what policies might fix it, you need to know how economists actually measure it, and where those measurements fall short. The five indicators covered here (not in the labour force, number unemployed, unemployment rate, labour force participation rate, employment-population ratio) are the building blocks for nearly every labour market discussion that follows in the course. If you are coming in cold, the only prerequisite is comfort with simple division and percentages.
Economists split the working-age population into people in the labour force (employed + unemployed) and people not in the labour force. From those buckets you can calculate three key rates: the unemployment rate, the labour force participation rate, and the employment-population ratio. None of them tells the full story on its own, and the unemployment rate in particular understates joblessness because it ignores discouraged workers, involuntary part-timers, and the underemployed.
Working-age population
Everyone aged 16 and over (in the US context) who is not institutionalised or on active military duty. This is the starting pool from which the BLS sorts people into "in the labour force" or "not in the labour force." Think of it as: the entire universe of people who could, in theory, hold a civilian job.
Labour force
The subset of the working-age population that is either employed or actively looking for work (unemployed). If you are neither working nor searching, you are not counted here. In simple terms, this means: everyone who is either holding a job or trying to get one.
Employed
Anyone who worked for pay (or profit) during the BLS survey reference week, even for as little as one hour. Unpaid family workers who put in 15+ hours also count. Think of it as: if you got a paycheque that week, you are employed in the BLS's eyes, regardless of hours or whether the job matches your skills.
Unemployed
People in the labour force who do not currently have a job but have actively searched for one in the past four weeks and are available to start. In simple terms, this means: jobless, looking, and ready to work.
Not in the labour force
Working-age individuals who are neither employed nor actively seeking employment. This includes retirees, full-time students, stay-at-home parents, and discouraged workers. Think of it as: anyone who could work but is not currently working or looking.
Unemployment rate
The percentage of the labour force that is unemployed: (Unemployed / Labour Force) × 100. In simple terms, this means: of everyone who is either working or trying to work, what share is failing to find a job?
Labour force participation rate (LFPR)
The percentage of the working-age population that is in the labour force: (Labour Force / Working-Age Population) × 100. Think of it as: how much of the eligible population is even in the game.
Employment-population ratio
The percentage of the working-age population that is employed: (Employed / Working-Age Population) × 100. In simple terms, this means: of everyone who could be working, what share actually is?
Discouraged workers
People who want a job and are available to work but have stopped searching because they believe no jobs are available for them. Because they are not actively looking, they fall out of the labour force and out of the unemployment rate entirely.
Marginally attached workers
People who want a job, are available, and have looked in the past 12 months, but not in the last four weeks. Like discouraged workers, they are not counted as unemployed.
Underemployment
A broader concept covering people working part-time who want full-time hours (involuntary part-timers) and people whose jobs do not match their skill level or qualifications. Think of it as: technically employed, but not in the way you would want to be.
The BLS starts with the working-age population and divides it into two groups:
In the labour force (employed + unemployed)
Not in the labour force (everyone else)
To find the number not in the labour force, subtract the labour force from the working-age population
Example from the assignment: 264 million − 164 million = 100 million not in the labour force
To find the number unemployed, subtract employed from the labour force
Example: 164 million − 153 million = 11 million unemployed
Unemployment rate tells you the share of the labour force without work
11m / 164m × 100 = 6.71%
The complement (93.29%) represents the share that is employed
Limitation: the denominator is the labour force, not the entire working-age population, so anyone who drops out of job-searching disappears from this figure
Labour force participation rate tells you how engaged the population is
164m / 264m × 100 = 62.12%
A falling LFPR can signal structural problems (ageing population, discouraged workers leaving) even if the unemployment rate looks healthy
Employment-population ratio tells you the broadest measure of who is working
153m / 264m × 100 = 57.95%
Unlike the unemployment rate, this cannot be gamed by people leaving the labour force, because the denominator stays fixed at the working-age population
The unemployment rate misses several categories of people who are, in a practical sense, suffering from a lack of adequate work:
Discouraged workers: stopped looking, so they drop out of the labour force and out of the unemployment rate calculation entirely
Marginally attached workers: similar to discouraged workers, but their reason for not searching may vary (transport barriers, childcare, etc.)
Involuntary part-time workers: the BLS counts anyone working for pay as employed. A person working 10 hours a week who wants 40 hours is still "employed"
Underemployed workers: someone with an engineering degree working as a barista is employed, but their skills are not being used. The unemployment rate does not capture this mismatch
The BLS publishes alternative measures (U-4, U-5, U-6) that progressively include these groups. U-6, the broadest measure, is often called the "real" unemployment rate in the media.
Indicator | Formula |
|---|---|
Not in labour force | Working-age population − Labour force |
Number unemployed | Labour force − Employed |
Unemployment rate | (Unemployed / Labour force) × 100 |
Labour force participation rate | (Labour force / Working-age population) × 100 |
Employment-population ratio | (Employed / Working-age population) × 100 |
These indicators are released monthly by the BLS in the Employment Situation report (often called the "jobs report"). Financial markets, the Federal Reserve, and policymakers all watch these numbers closely. A falling LFPR alongside a falling unemployment rate, for instance, might not be good news at all: it could mean people are giving up on finding work rather than finding jobs. This is precisely what happened during parts of the post-2008 recovery.
"If the unemployment rate drops, things are getting better." Not necessarily. The rate can fall because discouraged workers leave the labour force, shrinking the denominator. Always check the LFPR alongside it.
"People not in the labour force are all retired or in school." Many are discouraged or marginally attached workers who would take a job if one were available.
"Part-time workers are unemployed." The BLS counts them as employed. Even one hour of paid work in the reference week is enough.
"The unemployment rate and the employment-population ratio move in opposite directions." They often do, but not always. Both can fall simultaneously if people leave the labour force faster than jobs are being created.
⚠️ You will almost certainly be asked to calculate all three rates from a given set of population figures. Practise the arithmetic until it is automatic.
⚠️ Expect a question on why the unemployment rate is an imperfect measure. The three standard reasons are: discouraged/marginally attached workers, involuntary part-time employment, and underemployment.
⚠️ Know the difference between the unemployment rate (denominator = labour force) and the employment-population ratio (denominator = working-age population). Mixing up the denominators is the most common calculation error.
⚠️ Be ready to explain a scenario where the unemployment rate falls but the labour market is not improving (hint: people leaving the labour force).
True or False: A discouraged worker is counted as unemployed. False. They are not in the labour force at all.
Fill in the blank: The employment-population ratio uses __________ as its denominator. The working-age population.
True or False: If someone works 5 hours a week for pay, the BLS considers them employed. True.
Fill in the blank: The unemployment rate equals the number of unemployed divided by __________, multiplied by 100. The labour force.
True or False: The LFPR can fall even when the unemployment rate is also falling. True. Both can decline if people leave the labour force.
Q: Given a working-age population of 264 million, a labour force of 164 million, and 153 million employed, calculate the unemployment rate.
A: Unemployed = 164m − 153m = 11m. Unemployment rate = (11m / 164m) × 100 = 6.71%.
Q: Using the same figures, what is the labour force participation rate?
A: LFPR = (164m / 264m) × 100 = 62.12%.
Q: Explain why the unemployment rate can fall even when the labour market is not improving.
A: If discouraged workers stop looking for jobs, they leave the labour force. This shrinks the denominator of the unemployment rate calculation, which can push the rate down even though the actual number of people with jobs has not increased.
Q: Name three groups of people whose joblessness or underwork is not captured by the official unemployment rate.
A: Discouraged workers (stopped searching), involuntary part-time workers (want full-time but can only find part-time), and underemployed workers (working in jobs below their skill level).
Q: What is the key difference between the unemployment rate and the employment-population ratio?
A: The unemployment rate uses the labour force as its denominator (only those working or searching), while the employment-population ratio uses the entire working-age population. The latter is harder to distort because its denominator does not shrink when people stop looking for work.
This material connects directly to types of unemployment (frictional, structural, cyclical), which you will cover next. The indicators here tell you how much unemployment there is; the types explain why it exists.
The labour force participation rate becomes important again when studying long-run economic growth, because a shrinking LFPR constrains how much an economy can produce regardless of productivity gains.
The limitations of the unemployment rate tie into the broader theme of GDP and its shortcomings as a welfare measure. Just as GDP misses non-market production, the unemployment rate misses discouraged and underemployed workers.
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