labour is generally applied" is more important than the rate of employment.
In contrasting necessary quantities to luxuries, this book points out that customs made leather shoes   necessary in England but not in France. This work also states that "the skill, dexterity, and judgment  with which. . . labour is generally applied" is more important than the rate of employment. This book   also stated that it would cost thirty times as much money to produce wine in Scotland as in France,  so Scotland should allow imported wines. This also uses the example of a pin factory to demonstrate  the importance of the division of labor. Name this book completed in 1776 by Adam Smith.
In contrasting necessary quantities to luxuries, this book points out that customs made leather shoes   necessary in England but not in France.
An Inquiry into the Nature and Causes of the {Wealth of Nations}