How is Economic Skills Obsolescence (ESO) defined, distinguishing it from skill decay?

Answer

The possession of a skill becomes irrelevant because the job no longer demands it

ESO occurs when a worker's skills are technically sound but have become outdated due to evolving skill demands induced by technological and organizational shifts, meaning the market demand has shifted elsewhere.

How is Economic Skills Obsolescence (ESO) defined, distinguishing it from skill decay?
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