Final answer:
Structural unemployment occurs as a direct result of a mismatch between skills and jobs. This type of unemployment happens when individuals lack skills valued by employers.
Step-by-step explanation:
Structural unemployment occurs as a direct result of a mismatch between skills and jobs. This type of unemployment happens when individuals lack skills that are valued by employers either because demand has shifted away from their skills or because they never learned any skills. For example, after the U.S. space program downsized in the 1970s, there was a high level of unemployment among aerospace engineers because the demand for their skills decreased.