Macroeconomics: What are the Main Causes of Unemployment in an Economy?

Unemployment is present in every economy and measures how healthy an economy is. It is when workers who are able and willing to work don't have jobs. It is quite impossible to reach zero unemployment no matter how high aggregate demand is because there is always 'natural unemployment' that would occur in most businesses booms. A country measure's unemployment by taking the unemployment rate, which is the number of unemployed, expressed as a percentage of the labor force. (Labor force-the total number of people who do have jobs + people who are unemployed).
There are always people entering…