Substitution
Much that we once did at home we now pay others to do for us. For example, 100 years ago much food was grown, prepared, and eaten at home. Today the US "eat out" ratio is about 40%. And most food prepared at home is purchased in some "pre-prepared" state. This is an example of first-stage service.
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Compression Thinking »Compression Thinking
Compression vs. Expansion Thinking »Compression vs. Expansion Thinking
Expansion Economics »Expansion Economics
History - how did we get this way? »History - how did we get this way?
Service Industries »Service Industries
Substitution
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