the labor contribution of a person. May be not accurate, but roughly right.
A house worths $500k. An engineer earns $100k/year. It means 5 years labor of that engineer worths the house (= all the labor work other people put in to make that house).
A house worths $500k. An engineer earns $100k/year. It means 5 years labor of that engineer worths the house (= all the labor work other people put in to make that house).
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