Which one is the definition of structural unemployment?

QUESTION

Which one is the definition of structural unemployment?

1. Unemployment caused by the institutional structure of an economy or by economic restructuring making some skills obsolete
2. Unemployment that occurs during recessions and depressions.
3. The percentage of people in the economy who are both able to and looking for work but who cannot find jobs
4. Unemployment caused by people entering the job market and people quitting a job just long enough to look for and find another one

ANSWER

The correct option is 1. Unemployment caused by the institutional structure of an economy or by economic restructuring making some skills obsolete.