Definitions in Political Economy, / Preceded by an Inquiry Into the Rules which Ought to Guide Political Economists in the Definition and Use of Their Terms; with Remarks on the Deviation from These Rules in Their Writings

by T. R. Malthus

MEASURE OF THE MARKET OR ACTUAL VALUE OF A COMMODITY AT ANY PLACE OR TIME.

42. The quantity of labour which it will command or exchange for at that place and time.