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The division of labor.
§Improvement in “skill and dexterity.”
§Learning by doing.
§Spread fixed set-up costs.
§Less “sauntering” between tasks.
§Increased innovation.
§Operative focused on and benefits from “abridging labour.”
§Specializing in invention.
§Assign operatives according to comparative advantage.
Adam Smith (1723-1790).  Author of the Wealth of Nations (1776). Picture courtesy of the Warren J. Samuels Portrait Collection at Duke University.
Charles Babbage (1791-1871).