Labour employed in production and labour commanded: a Ricardian conjecture

This paper explains the origin of some important ambiguitiesin the analysis of value and prices put forward by Smith inhis Wealth of Nations by considering the possibility that theyreflect a previous draft of the book where the quantity of labouremployed in production was indicated as the sole determinantof real price and exchange ratios. This conjecture is evidencedindirectly by the way in which Smith presented his own analysisat the end of Book I, Chapter IV; by some passages containedin Book I and Book II which suggest that the quantity of labouremployed in production should play a crucial role within theanalysis of exchangeable value; and by the important modificationsintroduced by Smith in Book I, Chapter VI, after the first editionof the Wealth of Nations was published.