D.—: Productive and Unproductive Labour (p. 53)

The distinction was taken from Adam Smith, Wealth of Nations, bk. ii. ch. 3, who derived the words themselves from the French Physiocrats, though he used them in a different sense. It has been criticised by Jevons, Principles, ch. xviii., and Cancan, History of the Theories of Production and Distribution (1893), ch. i. § 7; and it is now but little used. Cf. Marshall, bk. ii. ch. 3.