Answer:
there are a large number of people working in the underground economy.
Step-by-step explanation:
The unemployment rate is the rate of people in the labour force that is without a job but they are actively looking for employment
Types of unemployment
structural unemployment is an unemployment that occurs as a result of changes in the economy. These changes can be as a result of changes in technology, polices or competition. Structural unemployment tends to be permanent.
Frictional unemployment: the period of time a person is unemployed from the period he leaves his current job and the time he gets another job. Eg. when a real estate agent who leaves a job in Texas and searches for a similar, higher-paying job in California.
Voluntary unemployment: e.g. worker at a fast-food restaurant who quits work and attends college.
Cyclical unemployment: it occurs as a result of fluctuations in the economy. Unemployment would be high in a downturn and low in a boom
If a large number of people are working underground, they would not be counted as part of the labour force and so the labour force would be smaller. This understates unemployment rate