I have no idea but you may look in a dictionary
Answer:
The answer is compensating wage differentials.
Explanation:
The term refers to an extra amount of money that should be offered to a worker in order to perform a difficult, dangerous or undisirable job. On the other hand, it's also possible to offer a <u>negative</u> differential for jobs that may be desirable or easy to perform (they get paid less).
Some factors to consider are risk of injury or risk of future unemployment.
