Hochschild, who introduced the term in 1979, distinguished emotion work - unpaid emotional work that a person undertakes in private life - from emotional labor: emotional work done in a paid work setting [REF].
However, the concept (if not the term) has been traced back as far as Aristotle: as Aristotle saw, the problem is not with emotionality, but with the appropriateness of emotion and its expression [REF].