Proposed definitions: It's a blue collar job iff physical demands > cognitive demands. Service job iff emotional labor > physical+cognitive.
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So if emotional > physical > cognitive, it's both a blue collar job and a service job? (Doesn't seem like a blue collar job.)
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not bad, but extremes: austronaut, surgeon have high physical & high cognitive.
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"Emotional labour"? How is the physical effort of holding a smile and withholding punches differ from any other physical labour?





